Item | Information |
---|---|
CAS RN | 79-44-7 |
Chemical Name | Dimethyl carbamyl chloride |
Substance ID | 23B5513 |
Classification year (FY) | FY2011 |
Ministry who conducted the classification | Ministry of Health, Labour and Welfare (MHLW)/Ministry of the Environment (MOE) |
New/Revised | Revised |
Classification result in other fiscal year | FY2006 |
Download of Excel format | Excel file |
Item | Information |
---|---|
Guidance used for the classification (External link) | Physical Hazards & Health Hazards: GHS Classification Guidance by the Japanese Government (July, 2010) Environmental Hazards: UN GHS Document (4th revised edition) |
UN GHS document (External link) | UN GHS document |
Definitions/Abbreviations (Excel file) | Definitions/Abbreviations |
Model Label by MHLW (External link) | MHLW Website (in Japanese Only) |
Model SDS by MHLW (External link) | MHLW Website (in Japanese Only) |
OECD/eChemPortal (External link) | eChemPortal |
Hazard class | Classification |
Pictogram Signal word |
Hazard statement (code) |
Precautionary statement (code) |
Rationale for the classification | |
---|---|---|---|---|---|---|
1 | Explosives | Not applicable |
- |
- | - | There are no chemical groups associated with explosive properties present in the molecule. |
2 | Flammable gases (including chemically unstable gases) | Not applicable |
- |
- | - | Liquid (GHS definition) |
3 | Aerosols | Not applicable |
- |
- | - | Not aerosol products. |
4 | Oxidizing gases | Not applicable |
- |
- | - | Liquid (GHS definition) |
5 | Gases under pressure | Not applicable |
- |
- | - | Liquid (GHS definition) |
6 | Flammable liquids | Category 4 |
Warning |
H227 |
P370+P378
P403+P235 P210 P280 P501 |
It corresponds to Category 4 from a flash point of 82 deg C [closed-cup] (MSDS (Sigma-Aldrich) (2011)), which is > 60 deg C and <= 93 deg C. |
7 | Flammable solids | Not applicable |
- |
- | - | Liquid (GHS definition) |
8 | Self-reactive substances and mixtures | Not applicable |
- |
- | - | There are no chemical groups present in the molecule associated with explosive or self-reactive properties. |
9 | Pyrophoric liquids | Not classified |
- |
- | - | It is estimated that it does not ignite at normal temperatures from an autoignition temperature of 410 deg C (Hommel (1996)). |
10 | Pyrophoric solids | Not applicable |
- |
- | - | Liquid (GHS definition) |
11 | Self-heating substances and mixtures | Classification not possible |
- |
- | - | Test methods applicable to liquid substances are not available. |
12 | Substances and mixtures which, in contact with water, emit flammable gases | Not applicable |
- |
- | - | The chemical structure of the substance does not contain metals or metalloids (B, Si, P, Ge, As, Se, Sn, Sb, Te, Bi, Po, At). |
13 | Oxidizing liquids | Not applicable |
- |
- | - | The substance is an organic compound containing oxygen and chlorine which are chemically bonded only to carbon. |
14 | Oxidizing solids | Not applicable |
- |
- | - | Liquid (GHS definition) |
15 | Organic peroxides | Not applicable |
- |
- | - | Organic compounds containing no bivalent -O-O- structure. |
16 | Corrosive to metals | Classification not possible |
- |
- | - | No data available. |
Hazard class | Classification |
Pictogram Signal word |
Hazard statement (code) |
Precautionary statement (code) |
Rationale for the classification | |
---|---|---|---|---|---|---|
1 | Acute toxicity (Oral) | Category 4 |
Warning |
H302 |
P301+P312
P264 P270 P330 P501 |
It was classified in Category 4 from an LD50 value of 1,170 mg/kg for rats (ACGIH (2007)). |
1 | Acute toxicity (Dermal) | Classification not possible |
- |
- | - | No data available. |
1 | Acute toxicity (Inhalation: Gases) | Not applicable |
- |
- | - | Liquid (GHS definition) |
1 | Acute toxicity (Inhalation: Vapours) | Category 2 |
Danger |
H330 |
P304+P340
P403+P233 P260 P271 P284 P310 P320 P405 P501 |
It was classified in Category 2 based on an LC50 value for rats of 180 ppm/6 hours (= 220.5 ppm/4 hours) (HSDB (2009)). Besides, because the toxicity value (180 ppm) is lower than 90% of the saturated vapour pressure concentration (2,566 ppm), the reference value of gasses was applied. |
1 | Acute toxicity (Inhalation: Dusts and mists) | Classification not possible |
- |
- | - | No data available. |
2 | Skin corrosion/irritation | Category 2 |
Warning |
H315 |
P302+P352
P332+P313 P362+P364 P264 P280 P321 |
It was classified in Category 2 by considering the report that it was mild to moderately irritating to the (eye and) skin of rabbits with changes produced being reversible within one week (ACGIH (2007)) as well as EU's classification as Xi; R38. |
3 | Serious eye damage/eye irritation | Category 2B |
Warning |
H320 |
P305+P351+P338
P337+P313 P264 |
It was classified in Category 2B by considering the report that it was mild to moderately irritating to the eye (and skin) of rabbits with changes produced being reversible within one week (ACGIH (2007)) as well as EU's classification as Xi; R36. |
4 | Respiratory sensitization | Classification not possible |
- |
- | - | No data available. |
4 | Skin sensitization | Classification not possible |
- |
- | - | It is reported that this substance was not a sensitizer in a test with guinea pigs (ACGIH (2007)), but because there is no description of the test method, and it is unknown if it is a test method approved by OECD, it was classified as "Classification not possible." |
5 | Germ cell mutagenicity | Category 2 |
Warning |
H341 |
P308+P313
P201 P202 P280 P405 P501 |
It was classified in Category 2 because it was reported to be positive in multiple micronucleus tests with mouse erythrocytes or bone marrow (in vivo mutagenicity tests) (IARC 71 (1999), ACGIH (2007)). Besides, it was reported to be negative in a sister chromatid exchange test with bone marrow cells after intraperitoneal administration to mice (in vivo somatic cell genotoxicity test) (IARC 71 (1999)), and as for in vitro tests, Ames tests gave mostly positive results (NTP DB (1979), IARC 71 (1999)), and it was reported to be positive in a gene mutation test with mouse lymphoma and a chromosomal aberration test with CHO cells (NTP DB (1979)). |
6 | Carcinogenicity | Category 1B |
Danger |
H350 |
P308+P313
P201 P202 P280 P405 P501 |
It was classified in Category 1B because it was classified in 2A by IARC, A2 by ACGIH, and 2A by the Japan Society For Occupational Health (JSOH). Besides, many reports indicate increased incidences of squamous cell carcinoma in the respiratory tract, including the nasal cavity, nasopharynx, larynx, and bronchus, in long-term inhalation exposure tests with rats (ACGIH (2007)). And in a life-long exposure test with hamsters, there is a report on occurrences of squamous cell carcinomas of the nasal cavity (50/99), which were not observed in the control group (IARC 71 (1999)). Furthermore, also after dermal administration, an increased incidence of tumors at the site of administration was reported in mice (IARC 71 (1999)). |
7 | Reproductive toxicity | Classification not possible |
- |
- | - | No data available. |
8 | Specific target organ toxicity - Single exposure | Category 1 (respiratory system) |
Danger |
H370 |
P308+P311
P260 P264 P270 P321 P405 P501 |
It is reported that all rats exposed to a saturated atmosphere for either 1 or 2 hours died with damage to the mucous membrane of the nose, throat, and lungs (IARC 12 (1976), ACGIH (2007)). The converted 4-hour equivalent value from the saturated vapour pressure concentration (11.3 mg/L) was 5.7-8.0 mg/L, corresponding to Category 1. Therefore, it was classified in Category 1 (respiratory system). |
9 | Specific target organ toxicity - Repeated exposure | Classification not possible |
- |
- | - | Data are lacking. Besides, liver disturbances were observed after occupational exposure (IARC 71 (1999)). However, because it is a report on only one case, and details such as a causal relationship are unknown, the classification is not possible. Furthermore, in an animal test, hamsters exposed to 1 ppm for 30 days showed normal body weights and survival (ACGIH (2007)), but there are no further descriptions, and the details of results are unknown. Besides, after 30-day exposure of rats to 1 ppm or above (exposure time per day: unknown) followed by observation up to two years, laryngeal hyperplasia and squamous metaplasia at 1 ppm and 10 ppm and tracheal squamous metaplasia at 10 ppm were seen, which were considered to be precancerous lesions (ACGIH (2007)). |
10 | Aspiration hazard | Classification not possible |
- |
- | - | No data available. |
Hazard class | Classification |
Pictogram Signal word |
Hazard statement (code) |
Precautionary statement (code) |
Rationale for the classification | |
---|---|---|---|---|---|---|
11 | Hazardous to the aquatic environment (Acute) | Category 2 |
- |
H401 |
P273
P501 |
It was classified in Category 2 from 96-hour EC50 = 6.2 mg/L for algae (Pseudokirchneriella subcapitata) (data on dimethylamine, a hydrolysate) (AQUIRE, 2012). |
11 | Hazardous to the aquatic environment (Long-term) | Not classified |
- |
- | - | Reliable chronic toxicity data were not obtained. As for dimethylamine, a hydrolysate, although it is classified in Category 2 in acute toxicity, it is rapidly degradable (a 4-week degradation rate by BOD: 88% (Biodegradation and Bioconcentration Results of Existing Chemical Substances under the Chemical Substances Control Law, 1975)), and low bioaccumulation is estimated (log Kow = -0.38 (PHYSPROP Database, 2009)). Therefore, it was classified as "Not classified." |
12 | Hazardous to the ozone layer | Classification not possible |
- |
- | - | This substance is not listed in the Annexes to the Montreal Protocol. |
|