Seqens Seqens

X

Find Methylene Dichloride manufacturers, exporters & distributors on PharmaCompass

PharmaCompass
API SUPPLIERS
API Suppliers

API Suppliers

US DMFs Filed

US DMFs Filed

CEP/COS Certifications

CEP/COS Certifications

0

JDMFs Filed

JDMFs Filed

0

Other Certificates

Other Certificates

0

Other Suppliers

Other Suppliers

API REF. PRICE (USD / KG)

0

INTERMEDIATES

0

DOSSIERS // FDF
USA (Orange Book)

USA (Orange Book)

0

Europe

Europe

0

Canada

Canada

0

Australia

Australia

0

South Africa

South Africa

0

Uploaded Dossiers

Uploaded Dossiers

0

GLOBAL SALES (USD Million)

U.S. Medicaid

0

Annual Reports

0

EXCIPIENTS
PATENTS & EXCLUSIVITIES

USFDA Orange Book Patents

0

USFDA Exclusivities

0

DIGITAL CONTENT

Blog #PharmaFlow

0

News

0

REF STANDARD

EDQM

USP

JP

0

Other Listed Suppliers

0

SERVICES

0

02575_FLUKA
Also known as: Dichloromethane, 75-09-2, Methylene dichloride, Methane, dichloro-, Methylene bichloride, Methane dichloride
Molecular Formula
CH2Cl2
Molecular Weight
84.93  g/mol
InChI Key
YMWUJEATGCHHMB-UHFFFAOYSA-N
FDA UNII
588X2YUY0A

A chlorinated hydrocarbon that has been used as an inhalation anesthetic and acts as a narcotic in high concentrations. Its primary use is as a solvent in manufacturing and food technology.
1 2D Structure

02575_FLUKA

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
dichloromethane
2.1.2 InChI
InChI=1S/CH2Cl2/c2-1-3/h1H2
2.1.3 InChI Key
YMWUJEATGCHHMB-UHFFFAOYSA-N
2.1.4 Canonical SMILES
C(Cl)Cl
2.2 Other Identifiers
2.2.1 UNII
588X2YUY0A
2.3 Synonyms
2.3.1 MeSH Synonyms

1. Bichloride, Methylene

2. Chloride, Methylene

3. Dichloride, Methylene

4. Dichloromethane

5. Methylene Bichloride

6. Methylene Dichloride

7. Solaesthin

2.3.2 Depositor-Supplied Synonyms

1. Dichloromethane

2. 75-09-2

3. Methylene Dichloride

4. Methane, Dichloro-

5. Methylene Bichloride

6. Methane Dichloride

7. Solaesthin

8. Solmethine

9. Freon 30

10. Narkotil

11. Aerothene Mm

12. Metylenu Chlorek

13. Chlorure De Methylene

14. Dichlormethan

15. Metaclen

16. Soleana Vda

17. Ch2cl2

18. Khladon 30

19. Dichloro-methane

20. F 30 (chlorocarbon)

21. Rcra Waste Number U080

22. Nci-c50102

23. R 30

24. Dichlormethane

25. Methoklone

26. Hcc 30

27. Salesthin

28. Dichloro Methane

29. Chlorodorm D

30. Nsc 406122

31. Un 1593

32. F 30

33. Methylene Chloride [nf]

34. Dichloromethane, Hplc Grade

35. 588x2yuy0a

36. Chebi:15767

37. Mfcd00000881

38. Nsc-406122

39. Methylene Chloride (nf)

40. Methylenum Chloratum

41. R30 (refrigerant)

42. Caswell No. 568

43. Metylenu Chlorek [polish]

44. Hsdb 66

45. Ccris 392

46. Chloride, Methylene

47. Chlorure De Methylene [french]

48. Bichloride, Methylene

49. Dichloride, Methylene

50. Einecs 200-838-9

51. Un1593

52. Dichloromethane, Nf

53. Rcra Waste No. U080

54. Dichloromethane, Acs

55. Epa Pesticide Chemical Code 042004

56. Brn 1730800

57. Dichioromethane

58. Dichlormetane

59. Dichloromeihane

60. Dichlorometan

61. Dichlorometane

62. Dichloromethan

63. Dichoromethane

64. Dicloromethane

65. Methylenchoride

66. Metylenchloride

67. Unii-588x2yuy0a

68. Methylenchlorid

69. Aerothene

70. Driverit

71. Nevolin

72. Dichlor-methane

73. Dichlorometliane

74. Dichlorornethane

75. Dicliloromethane

76. Methylenchloride

77. Methylenechlorid

78. Methyienechlorid

79. Di-chloromethane

80. Dichloromethane-

81. Methlyenechloride

82. Methylenechloride

83. Ai3-01773

84. Dichloromethane, Suitable For 5000 Per Jis, For Residue Analysis

85. Methlene Chloride

86. Methyene Chloride

87. Methylen Chloride

88. Methylene Chlorie

89. Methylene Cloride

90. Metylene Chloride

91. Methylene Choride

92. Mehtylene Chloride

93. Methlyene Chloride

94. Methylene,chloride

95. Methylene-chloride

96. Dichloro -methane

97. Dichloro- Methane

98. Methylenedichloride

99. Distillex Ds3

100. Dichloromethane, Acs Reagent, >=99.5%, Contains 40-150 Ppm Amylene As Stabilizer

101. M-clean D

102. Methyl Ene Chloride

103. Dichloromethane (methylene Chloride)

104. Mecl2

105. Dcm,sp Grade

106. Methylene Di Chloride

107. N,n-methylenechloride

108. Dichloromethane Solution

109. Methylene Chloride Acs

110. Cl2ch2

111. H2ccl2

112. Dsstox_cid_868

113. Dichloromethane, Anhydrous

114. Dichloromethane, For Hplc

115. Ec 200-838-9

116. Ncimech_000221

117. Wln: G1g

118. Dsstox_rid_75836

119. Dsstox_gsid_20868

120. 4-01-00-00035 (beilstein Handbook Reference)

121. Dichloromethane, >=99.9%

122. Chembl45967

123. Dichloromethane [iarc]

124. Methylene Chloride (recovered)

125. Dichloromethane, Ar, >=99%

126. Dichloromethane (peptide Grade)

127. Dichloromethane [mart.]

128. Methylene Chloride [ii]

129. Methylene Chloride [mi]

130. Dtxsid0020868

131. Methylene Chloride [fcc]

132. Dtxsid60166893

133. Methylene Chloride [hsdb]

134. Dichloromethane Reagent Grade Acs

135. Dichloromethane, Lr, >=99.5%

136. Dichloromethane, Purification Grade

137. Methylene Chloride [vandf]

138. Dichloromethane, Analytical Standard

139. Dichloromethane, Environmental Grade

140. Methylene Chloride [usp-rs]

141. Tox21_202526

142. Nsc406122

143. Stl264204

144. Akos009031498

145. Dichloromethane [un1593] [poison]

146. Dichloromethane, Acs Reagent, 99.5%

147. Cas-75-09-2

148. Dichloromethane, For Hplc, >=99.7%

149. Dichloromethane Gc, For Residue Analysis

150. Dichloromethane, Spectrophotometric Grade

151. Methylene Chloride [ep Monograph]

152. Ncgc00091504-01

153. Ncgc00260075-01

154. Dichloromethane 100 Microg/ml In Methanol

155. Dichloromethane, Suitable For Pcb Analysis

156. Dichloromethane 1000 Microg/ml In Methanol

157. D0529

158. D3478

159. Ft-0624716

160. Ft-0624717

161. M0629

162. Dichloromethane, 99%, Stabilized With Ethanol

163. Dichloromethane, For Hplc, >=99.8% (gc)

164. Dichloromethane, Saj First Grade, >=99.0%

165. Dichloromethane, Selectophore(tm), >=99.5%

166. C02271

167. D02330

168. Dichloromethane, Analytical Standard, Stabilized

169. Dichloromethane, Jis Special Grade, >=99.0%

170. L023970

171. Q421748

172. Q425210

173. J-610006

174. Dichloromethane, 99%, Stab. With Ca. 50ppm Amylene

175. Methylene Chloride Hplc Grade Stabilized With Amylene

176. Dichloromethane Solution, Contains 10 % (v/v) Methanol

177. Dichloromethane, Glass Distilled Hrgc/hplc Trace Grade

178. Dichloromethane, Tlc High-purity Grade, >=99.8% (gc)

179. Dichloromethane Hplc, Uv/ir, Min. 99.9%, Isocratic Grade

180. Dichloromethane, Special, 99.9%, Contains 40-60 Ppm Amylene

181. Dichloromethane, For Hplc, >=99.8%, Contains Amylene As Stabilizer

182. Dichloromethane, Selectophore(tm), >=99.5% (gc), Inhibitor-free

183. Dichloromethane, Suitable For 300 Per Jis, For Residue Analysis

184. Dichloromethane, Technical Grade, 95%, Contains 40-60 Ppm Amylene

185. Methylene Chloride, European Pharmacopoeia (ep) Reference Standard

186. Dichloromethane, Puriss. P.a., Acs Reagent, Reag. Iso, >=99.9% (gc)

187. Dichloromethane, Uv Hplc Spectroscopic, 99.9%, Contains 40-60 Ppm Amylene

188. Dichloromethane Solution, 10 % (v/v) In Methanol, 1 % (v/v) In Ammonium Hydroxide

189. Dichloromethane Solution, Certified Reference Material, 200 Mug/ml In Methanol

190. Dichloromethane Solution, Certified Reference Material, 5000 Mug/ml In Methanol

191. Dichloromethane, Acs Reagent, >=99.5%, Contains 50 Ppm Amylene As Stabilizer

192. Dichloromethane, Anhydrous, >=99.8%, Contains 40-150 Ppm Amylene As Stabilizer

193. Dichloromethane, Anhydrous, Contains 40-150 Ppm Amylene As Stabilizer, Zero2(tm), >=99.8%

194. Dichloromethane, Biotech. Grade, 99.9%, Contains 40-150 Ppm Amylene As Stabilizer

195. Dichloromethane, Contains 40-150 Ppm Amylene As Stabilizer, Acs Reagent, >=99.5%

196. Dichloromethane, For Hplc, >=99.9%, Contains 40-150 Ppm Amylene As Stabilizer

197. Dichloromethane, Puriss., Meets Analytical Specification Of Ph.??eur., Nf, >=99% (gc)

198. Dichloromethane, Suitable For 1000 Per Jis, >=99.5%, For Residue Analysis

199. Methylene Chloride, Pharmaceutical Secondary Standard; Certified Reference Material

200. Dichloromethane, >=99.9%, Capillary Gc Grade, Suitable For Environmental Analysis, Contains Amylene As Stabilizer

201. Dichloromethane, Acs Spectrophotometric Grade, >=99.5%, Contains 50-150 Ppm Amylene As Stabilizer

202. Dichloromethane, Hplc Plus, For Hplc, Gc, And Residue Analysis, >=99.9%, Contains 50-150 Ppm Amylene As Stabilizer

203. Dichloromethane, Laboratory Reagent, >=99.9% (without Stabilizer, Gc), Contains 0.1-0.4% Ethanol As Stabilizer

204. Dichloromethane, P.a., Acs Reagent, Reag. Iso, Reag. Ph. Eur., 99.8%, Contains 40-60 Ppm Amylene

205. Dichloromethane, Puriss. P.a., Acs Reagent, Reag. Iso, Dried, >=99.8% (gc), <=0.001% Water

206. M.c

207. Residual Solvent Class 2 - Methylene Chloride, United States Pharmacopeia (usp) Reference Standard

2.4 Create Date
2004-09-16
3 Chemical and Physical Properties
Molecular Weight 84.93 g/mol
Molecular Formula CH2Cl2
XLogP31.5
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count0
Rotatable Bond Count0
Exact Mass83.9533555 g/mol
Monoisotopic Mass83.9533555 g/mol
Topological Polar Surface Area0 Ų
Heavy Atom Count3
Formal Charge0
Complexity2.8
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1
4 Pharmacology and Biochemistry
4.1 Absorption, Distribution and Excretion

Methylene chloride is removed from the body mainly in expired air and urine. In four human subjects exposed to methylene chloride (350 mg/cu m) for 2 hr, an average of 22.6 microg methylene chloride was excreted in the urine within 24 hr after the exposure. In seven subjects exposed to 710 mg/cu m for 2 hr, the corresponding value was 81.5 ug. These data show that the amount excreted in the urine is insignificant. Methylene chloride excretion in expired air was most evident during the first 30 min after exposure. Initial post-exposure concentrations of methylene chloride in expired breath following 2-and 4-hr exposure periods were about 71 mg/cu m and fell to about 18 mg/cu m at the end of 30 min. Small amounts of methylene chloride remained in the expired air at 2.5 hr.

International Programme on Chemical Safety/ Environmental Health Criteria 164; Methylene Chloride (Second Edition). (1996). Available from, as of July 18, 2014: https://www.inchem.org/documents/ehc/ehc/ehc164.htm


The fat content of the body was calculated in 12 healthy male subjects aged 21 to 35 years by means of hydrostatic weighing and anthropometric estimation of skeletal weight. The subjects were exposed to a concentration of 2,600 mg of methylene chloride per cubic meter of inspired air (750 ppm) for 1 hr while performing work at an intensity of 50 W on a bicycle ergometer. The uptake in the organism was measured continuously with the Douglas bag technique. The amount of methylene chloride absorbed correlated highly with degree of obesity and body weight. Needle biopsy specimens of subcutaneous adipose tissue were taken from the buttocks before exposure and 0, 1, 2, 3 and 4 hr after exposure. The mean yield of tissue from the 72 biopsies was 25 mg. The concentration of methylene chloride in the adipose tissue was determined by gas chromatography, using a headspace method. The mean concentration was 10.2 mg/kg 1 hr after exposure and 8.4 mg/kg after 4 hr. There was a wide distribution around the mean values. In the six slim subjects the concentration in the adipose tissue during the 4 hr after exposure was on an average twice that of the six more obese subjects. On the other hand, in spite of lower concentrations, the obese subjects had a greater calculated amount of methylene chloride in the total fat depots of the body. Two subjects were studied about 22 hr after exposure, the concentration in subcutaneous adipose tissue being 1.6 and 1.7 mg/kg, respectively, at that time.

PMID:594729 Engstrom J et al; Scand J Work Environ Health. 3(4):215-24 (1977) https://www.inchem.org/documents/ehc/ehc/ehc164.htm


A detailed study of the relationship between the measurements of methylene chloride in expired air or blood, carbon monoxide in expired air and CO-Hb in blood was undertaken... At the end of exposure of non-smoking, sedentary volunteers for 7.5 hr to methylene chloride vapour concentrations of 180-710 mg/cu m, the mean concentration of the solvent in alveolar air and in blood, and the percent CO-Hb saturation were measured... By 7 hr after exposure to any concentration, the expired air contained less than 3.5 mg/cu m methylene chloride; at 16 hr, only negligible levels were detected. These data suggest that, due to its rapid elimination, measurements of methylene chloride in expired air are unsuitable for use as a marker of occupational exposure.

International Programme on Chemical Safety/ Environmental Health Criteria 164; Methylene Chloride (Second Edition). (1996). Available from, as of July 18, 2014: https://www.inchem.org/documents/ehc/ehc/ehc164.htm


...the effects of exercise and cigarette smoking on the uptake, metabolism and excretion of methylene chloride /was investigated/. The effects of smoking and methylene chloride exposure on CO-Hb saturation levels were found to be additive. Exercise was found to increase the absorption of methylene chloride and CO-Hb levels. However, the effects of exercise on CO-Hb were not observed to increase with heavy workloads beyond the level achieved with moderate work-loads, suggesting a saturation of this effect...

International Programme on Chemical Safety/ Environmental Health Criteria 164; Methylene Chloride (Second Edition). (1996). Available from, as of July 18, 2014: https://www.inchem.org/documents/ehc/ehc/ehc164.htm


For more Absorption, Distribution and Excretion (Complete) data for DICHLOROMETHANE (25 total), please visit the HSDB record page.


4.2 Metabolism/Metabolites

A modified version of the original physiologically based pharmacokinetic (PBPK) model by Andersen et al. (1987) has been developed and used in conjunction with previously published human kinetic data for dichloromethane (DCM) metabolism and to assess interindividual variability in the rate of oxidative metabolism. Time-course data for 13 volunteers (10 males, 3 females) exposed to one or more concentrations of DCM (50 ppm, 100 ppm, 150 ppm, or 200 ppm) for 7.5 hr were used to optimize the maximal rate of hepatic metabolism (V(maxC)) through the cytochrome P450 pathway for each individual. DCM breath and blood concentrations were used, along with carboxyhemoglobin concentrations in blood and carbon monoxide (CO) concentrations in exhaled breath, to estimate the model parameters. Significant improvements in model fit were achieved when extrahepatic oxidative metabolism of DCM was added to the model structure. The 13 individual V(maxC) values ranged from 7.1 to 23.6 mg/hr/kg0.7 and appeared to be bimodally distributed. The distribution was not sex related and may be related to differential CYP2E1 induction. A comparison of the observed variation in V(maxC) values to other estimates of variability in the rate of oxidative metabolism and human CYP2E1 activity suggest a relatively narrow range in human hepatic activity toward DCM.

PMID:15501612 Sweeney LM et al; Toxicol Lett. 154(3):201-16 (2004).


Dichloromethane (DCM, methylene chloride) is a lipophilic volatile compound readily absorbed and then metabolized to several metabolites that may lead to chronic toxicity in different target organs. Physiologically based pharmacokinetic (PBPK) models are useful tools for calculation of internal and target organ doses of parent compound and metabolites. PBPK models, coupled with in vivo inhalation gas-uptake data, can be useful to estimate total metabolism. Previously, such an approach was used to make predictions regarding the metabolism and to make subsequent inferences of DCM's mode of action for toxicity. However, current evidence warrants re-examination of this approach. The goal of this work was to examine two different hypotheses for DCM metabolism in mice. One hypothesis describes two metabolic pathways: one involving cytochrome P450 2E1 (CYP2E1) and a second glutathione (GSH). The second metabolic hypothesis describes only one pathway mediated by CYP2E1 that includes multiple binding sites. The results of our analysis show that the in vivo gas-uptake data fit both hypotheses well and the traditional analysis of the chamber concentration data is not sufficient to distinguish between them. Gas-uptake data were re-analyzed by construction of a velocity plot as a function of increasing DCM initial concentration. The velocity (slope) analysis revealed that there are two substantially different phases in velocity, one rate for lower exposures and a different rate for higher exposures. The concept of a "metabolic switch," namely that due to conformational changes in the enzyme after one site is occupied - a different metabolic rate is seen - is also consistent with the experimental data. Our analyses raise questions concerning the importance of GSH metabolism for DCM. Recent research results also question the importance of this pathway in the toxicity of DCM. GSH-related DNA adducts were not formed after in vivo DCM exposure in mice and DCM-induced DNA damage has been detected in human lung cultures without GSH metabolism. In summary, a revised/updated metabolic hypothesis for DCM has been examined using in vivo inhalation data in mice combined with PBPK modeling that is consistent with up-to-date models of the active site for CYP2E1 and suggests that this pathway is the major metabolizing pathway for DCM metabolism.

PMID:20153349 Evans MV et al.; Toxicol Appl Pharmacol. 244(3):280-90 (2010).


Dichloromethane (DCM) is a hepatic and pulmonary carcinogen in mice exposed to high doses by inhalation. It has been shown previously that the incidence of liver and lung tumors does not increase in rats or hamsters exposed to the dihaloalkane under conditions similar to those that produced tumors in mice. The biological consequences of DCM exposure to humans is therefore uncertain. The carcinogenic effects of DCM in the mouse are caused by the interaction with DNA of a glutathione (GSH) conjugate that is produced by the class theta glutathione S-transferase T1-1 (GST T1-1). The species specificity is thought to be due to the greater amount of transferase activity in mouse target organs and specific nuclear localization of GST T1-1 in target cells. This paper directly compares the relative capacity and locality of DCM activation in mouse and human tissues. The results show that mouse GST T1-1 is more efficient in catalyzing the conjugation of DCM with GSH than the orthologous human enzyme. In addition, the mouse expresses higher levels of the transferase than humans in hepatic tissue. Histochemical analysis confirmed the presence of GST T1-1 in the nucleus of mouse liver cells. However, in human liver GST T1-1 was detected in bile duct epithelial cells and hepatocyte nuclei but was also present in the cytoplasm. Taking this information into account, it is unlikely that humans have a sufficiently high capacity to activate DCM for this compound to be considered to represent a carcinogenic risk.

PMID:11884241 Sherratt PJ et al; Toxicol Appl Pharmacol. 179(2):89-97 (2002).


... Biotransformation into carbon monoxide of dichloromethane ... by rat has been reported ... more recent studies of human exposure to dichloromethane in factory workers have confirmed these findings & have also demonstrated that incr expiration of carbon monoxide also occurs.

The Chemical Society. Foreign Compound Metabolism in Mammals. Volume 4: A Review of the Literature Published during 1974 and 1975. London: The Chemical Society, 1977., p. 231


For more Metabolism/Metabolites (Complete) data for DICHLOROMETHANE (9 total), please visit the HSDB record page.


Methylene chloride has known human metabolites that include Dichloromethanol.

S73 | METXBIODB | Metabolite Reaction Database from BioTransformer | DOI:10.5281/zenodo.4056560


4.3 Biological Half-Life

For carboxyhemoglobin in blood: 12-16 hours; [TDR, p. 862]

TDR - Ryan RP, Terry CE, Leffingwell SS (eds). Toxicology Desk Reference: The Toxic Exposure and Medical Monitoring Index, 5th Ed. Washington DC: Taylor & Francis, 1999., p. 862


Dichloromethane (DCM) elimination and carboxyhemoglobin (COHb) generation were examined in adult female SD rats pretreated with a glutathione (GSH) depletor(s). Rats were treated with either buthionine sulfoximine (BSO; 2 mmol/kg, i.p.), diethylmaleate (DEM; 3 mmol/kg, i.p.), phorone (PHO; 1 mmol/kg, i.p.) or BSO plus PHO (BSO; 2 mmol/kg +PHO; 0.5 mmol/kg, i.p.). ...The half-life of DCM in blood was also increased in rats pretreated with the GSH depletor(s).

PMID:11879980 Oh SJ et al; Toxicol Lett. 129(1-2):107-14 (2002).


When rats (male, Sprague-Dawley) were exposed to 50, 500, and 1500 ppm methylene chloride (dichloromethane, DCM) for 6 hr, plasma dichloromethane levels at apparent steady state were disproportionately higher with increasing exposure concn. Blood carboxyhemoglobin (HbCO) was 3% at 50 ppm and 10-13% at 500 ppm and at 1500 ppm. At the end of the 6 hr exposure, HbCO levels declined with half-life of 23 min.

PMID:6815830 McKenna MJ et al; Toxicol Appl Pharmacol 65 (1): 1-10 (1982)


4.4 Mechanism of Action

The mechanism by which methylene chloride induces mammary adenomas in the rat is important for human hazard assessment. Female Sprague- Dawley rats receiving methylene chloride have a high blood level of prolactin. In common with the response to other agents which act via hyperprolactinaemia, the methylene chloride-induced response is of benign neoplasms only. There is no evidence for the binding of methylene chloride to the DNA of other tissues and hence it seems unlikely that it will bind to mammary tissue when the primary site of metabolism is the liver. It seems most likely, therefore, that the increased incidence of mammary adenomas is the result of an indirect mechanism operating via hyperprolactinaemia.

International Programme on Chemical Safety/ Environmental Health Criteria 164; Methylene Chloride (Second Edition). (1996). Available from, as of July 18, 2014: https://www.inchem.org/documents/ehc/ehc/ehc164.htm


Dichloromethane (DCM) is a hepatic and pulmonary carcinogen in mice exposed to high doses by inhalation. It has been shown previously that the incidence of liver and lung tumors does not increase in rats or hamsters exposed to the dihaloalkane under conditions similar to those that produced tumors in mice. The biological consequences of DCM exposure to humans is therefore uncertain. The carcinogenic effects of DCM in the mouse are caused by the interaction with DNA of a glutathione (GSH) conjugate that is produced by the class theta glutathione S-transferase T1-1 (GST T1-1). The species specificity is thought to be due to the greater amount of transferase activity in mouse target organs and specific nuclear localization of GST T1-1 in target cells. This paper directly compares the relative capacity and locality of DCM activation in mouse and human tissues. The results show that mouse GST T1-1 is more efficient in catalyzing the conjugation of DCM with GSH than the orthologous human enzyme. In addition, the mouse expresses higher levels of the transferase than humans in hepatic tissue. Histochemical analysis confirmed the presence of GST T1-1 in the nucleus of mouse liver cells. However, in human liver GST T1-1 was detected in bile duct epithelial cells and hepatocyte nuclei but was also present in the cytoplasm. Taking this information into account, it is unlikely that humans have a sufficiently high capacity to activate DCM for this compound to be considered to represent a carcinogenic risk.

PMID:11884241 Sherratt PJ et al; Toxicol Appl Pharmacol. 179(2):89-97 (2002).


Dichloromethane (DCM) is considered a probable human carcinogen. Laboratory studies have shown an increased incidence of lung and liver cancer in mice but not in rats or hamsters. Despite the correlation between metabolism of DCM by the glutathione-S-transferase (GST) pathway and the occurrence of tumors in different species, the mechanism of tumor induction by DCM metabolites produced through the GST pathway remains unclear. In this study a V79 cell line stably transfected with the murine GST theta 1 gene (mGSTT1) was compared to the parent cell line (MZ) to determine how the construct affects DCM metabolism and the sensitivity of the cell line to DNA damage and cytotoxicity. V79 cells were treated with DCM (2.5-10mM) or formaldehyde (150-600muM) for 2hr. Also, formaldehyde produced by V79 cytosol metabolism of DCM was measured spectrophotometrically. DNA damage and DNA-protein crosslinks were measured by the standard and proteinase K-modified alkaline single cell gel electrophoresis (SCG) assays. Cytotoxicity was assessed by trypan blue stain exclusion, the Live/Dead((R)) cell viability/cytotoxicity kit for animal cells, and the neutral red assay. After DCM treatment a significant concentration-dependent increase in tail moment in the V79 MZ cells was observed compared to a significant concentration-dependent decrease in tail moment in the V79 mGSTT1 cells. Post-incubation with proteinase K significantly increased DNA migrations in DCM-treated V79 mGSTT1 cells. DCM formed significantly higher levels of formaldehyde in the cytosol of the V79 mGSTT1 cells than in the cytosol of the V79 MZ cells. Results using the cytotoxicity assays were comparable using the trypan blue and Live/Dead((R)) assays, neither showing a difference in response between the two cell lines when exposed to either formaldehyde or DCM. These results indicate that V79 mGSTT1 can metabolize DCM to a genotoxic and cytotoxic metabolite, which is likely formaldehyde...

PMID:16765633 Hu Y et al; Mutat Res. 607(2):231-9 (2006).


The correlation between biol activity (toxicity and mutagenic effectiveness in Salmonella TA 100) and reactivity towards strong nucleophiles indicates that reactions with nucleophilic groups of high reactivity in biological materials, possibly SH or amino groups in proteins, are involved in dichloromethane's mechanism of action.

PMID:6352069 Osterman-Golkar S; Chem Biol Interact 46 (1): 121-30 (1983)


Increases in the concn of dichloromethane (DCM) lower the oxygen affinity of human hemoglobin as demonstrated by the shift of the oxygenation curves to higher partial pressures of oxygen and increase in the p50 (oxygen pressure necessary for fractional saturation of 0.50). Dichloromethane binds weakly to hemoglobin at four different sites, but binding to only one site is responsible for decreasing the oxygen affinity of hemoglobin.

PMID:7093282 Saxena AM et al; Biochem Biophys Acta 704: 1-6 (1982)


Ask Us for Pharmaceutical Supplier and Partner
Ask Us, Find A Supplier / Partner
No Commissions, No Strings Attached, Get Connected for FREE

What are you looking for?

How can we help you?

The request can't be empty

Please read our Privacy Policy carefully

You must agree to the privacy policy

The name can't be empty
The company can't be empty.
The email can't be empty Please enter a valid email.
The mobile can't be empty
Post Enquiry
POST ENQUIRY