GHS Classification Result
GENERAL INFORMATION
REFERENCE INFORMATION
PHYSICAL HAZARDS
HEALTH HAZARDS
ENVIRONMENTAL HAZARDS
NOTES:
Updated date:
GENERAL INFORMATION
| Item | Information |
|---|---|
| CAS number | 544-97-8 |
| Chemical name | Dimethylzinc |
| Substance ID | 23A5112 |
| Fiscal year of classification conducted | FY2011 |
| Classifier(s) (Ministries) | Ministry of Health, Labour and Welfare （MHLW）, Ministry of the Environment （MOE） |
| New/Revised | New |
| Download in Excel format | Excel file |
| Item | Information |
|---|---|
| Guidance used for classification (External link) |
Physical Hazards & Health Hazards: GHS Classification Guidance by the Japanese Government （July, 2010）
Environmental Hazards: UN GHS Document （4th revised edition） |
| 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 (Code: symbol) Signal word |
Code (Hazard statement) |
Code (Precautionary statement) |
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 | - | - | - | "Liquids" according to GHS definition. |
| 3 | Aerosols | Not applicable | - | - | - | Not an aerosol product. |
| 4 | Oxidizing gases | Not applicable | - | - | - | "Liquids" according to GHS definition. |
| 5 | Gases under pressure | Not applicable | - | - | - | "Liquids" according to GHS definition. |
| 6 | Flammable liquids | Category 2 |  |
H225 |
P303+P361+P353 P370+P378 P403+P235 P210 P233 P240 P241 P242 P243 P280 P501 |
A flash point of < 23 degrees C in a prescribed closed-cup test method is estimated from -1 degrees C [unkown] (Lange (16th, 2005)) in an unknown test method, and an initial boiling point of 46 degrees C (Merck (14th, 2006)) is > 35 degrees C, therefore, it corresponds to Category 2. |
| 7 | Flammable solids | Not applicable | - | - | - | "Liquids" according to GHS definition. |
| 8 | Self-reactive substances and mixtures | Not applicable | - | - | - | Containing neither chemical groups related to explosibility nor those related to self-reactivity. |
| 9 | Pyrophoric liquids | Category 1 | |
H250 |
P302+P334 P370+P378 P210 P222 P280 P422 |
From an autoignition temperature of < -17.8 (below 0 degrees F) (HSDB (2008)), it was classified in Category 1. Besides, it was formerly classified in class 4.2 subsidiary risk 4.3PGI in UNRTDG (UN1370: dimethyl zinc), but it is now classified in class 4.2 subsidiary risk 4.3PGI in UNRTDG (UN3394: organometallic substance, liquid, pyrophoric, water-reactive) (IMDGAmdt.33-06 (2006)). |
| 10 | Pyrophoric solids | Not applicable | - | - | - | "Liquids" according to GHS definition. |
| 11 | Self-heating substances and mixtures | Not applicable | - | - | - | It is classified as a pyrophoric liquids. |
| 12 | Substances and mixtures which, in contact with water, emit flammable gases | Classification not possible | - | - | - | From information that it reacts violently with water, evolving methane (HSDB (2008)) and that it is classified in class 4.2 subsidiary risk 4.3PGI in UNRTDG (UN3394: organometallic substance, liquid, pyrophoric, water-reactive) (formerly classified in class 4.2 subsidiary risk 4.3PGI (UN1370: dimethyl zinc)) (IMDGAmdt.33-06 (2006)), it is classified as "substance and mixtures which, in contact with water, emit flammable gases", but the sub-categorization is not possible due to subsidiary risk 4.3. |
| 13 | Oxidizing liquids | Not applicable | - | - | - | An organic compound that does not contain oxygen, fluorine, or chlorine. |
| 14 | Oxidizing solids | Not applicable | - | - | - | "Liquids" according to GHS definition. |
| 15 | Organic peroxides | Not applicable | - | - | - | An organic compound that does not contain -O-O- structure. |
| 16 | Corrosive to metals | Classification not possible | - | - | - | No established test method suitable for liquid substances with a low boiling point. |
| Hazard class | Classification |
Pictogram (Code: symbol) Signal word |
Code (Hazard statement) |
Code (Precautionary statement) |
Rationale for the classification | |
|---|---|---|---|---|---|---|
| 1 | Acute toxicity （Oral） | Classification not possible | - | - | - |
No data. Besides, refer to health hazards of zinc oxide (CAS No.1314-13-2) and methane (CAS No.74-82-8) because this substance reacts readily with air or water to form zinc oxide and methane. |
| 1 | Acute toxicity （Dermal） | Classification not possible | - | - | - | No data. |
| 1 | Acute toxicity （Inhalation: Gases） | Not applicable | - | - | - | "Liquids" according to GHS definition. |
| 1 | Acute toxicity （Inhalation: Vapours） | Classification not possible | - | - | - | No data. |
| 1 | Acute toxicity （Inhalation: Dusts and mists） | Classification not possible | - | - | - | No data. |
| 2 | Skin corrosion/irritation | Category 1 |  |
H314 |
P301+P330+P331 P303+P361+P353 P305+P351+P338 P304+P340 P260 P264 P280 P310 P321* P363 P405 P501 |
On the basis of the information that "Skin will undergo thermal and acid burns when chemical reacts with moisture in skin. Unless washed quickly, skin may be scarred" (HSDB (2008)) and on the basis of C; R34 in EU Classification (EC-JRC (ESIS) (Access on July. 2011)), it was classified in Category 1. |
| 3 | Serious eye damage/eye irritation | Category 1 | |
H318 |
P305+P351+P338 P280 P310 |
On the basis of the information that "Eyes are immediately & severely irritated by liq, vapor, or dilute soln. If not removed by thorough flushing with water, chemical may permanently damage cornea" (HSDB (2008)) and on the basis of classification "skin corrosive substances" in skin corrosion/irritation, it was classified in Category 1. |
| 4 | Respiratory sensitization | Classification not possible | - | - | - | No data. |
| 4 | Skin sensitization | Classification not possible | - | - | - | No data. |
| 5 | Germ cell mutagenicity | Classification not possible | - | - | - | No data. |
| 6 | Carcinogenicity | Classification not possible | - | - | - | No data. |
| 7 | Reproductive toxicity | Classification not possible | - | - | - | No data. |
| 8 | Specific target organ toxicity - Single exposure | Category 3 （Respiratory tract irritation） |  |
H335 |
P304+P340 P403+P233 P261 P271 P312 P405 P501 |
On the basis of the information that "Inhalation of mist or vapor causes immediate irritation of upper resp tract", it was classified in Category 3 (respiratory tract irritation). Besides, the information that "Ingestion would cause immediate burns at site of contact. Nausea, vomiting, cramps, and diarrhea may follow" (HSDB (2008)) was not used as a basis for classification due to local effects by irritation. |
| 9 | Specific target organ toxicity - Repeated exposure | Classification not possible | - | - | - |
Lack of data. Besides, there is information that "excessive or prolonged inhalation of fumes from ignition or decomp may cause ‘metal fume fever’ (sore throat, headache, fever, chills, nausea, vomiting, muscular aches, perspiration, constricting sensation in lung, weakness, prostration)" (HSDB (2008)). |
| 10 | Aspiration hazard | Classification not possible | - | - | - | No data. |
| Hazard class | Classification |
Pictogram (Code: symbol) Signal word |
Code (Hazard statement) |
Code (Precautionary statement) |
Rationale for the classification | |
|---|---|---|---|---|---|---|
| 11 | Hazardous to the aquatic environment （Acute） | Classification not possible | - | - | - | No data. |
| 11 | Hazardous to the aquatic environment （Long-term） | Classification not possible | - | - | - | No data. |
| 12 | Hazardous to the ozone layer | Classification not possible | - | - | - | This substance is not listed in Annexes to the Montreal Protocol. |
NOTES:
|
* Classification was conducted by relevant Japanese Ministries in accordance with GHS Classification Guidance for the Japanese Government, and is intended to provide a reference for preparing GHS labelling and SDS for users. * This is a provisional English translation of classification results and is subject to revision without notice. * The responsibility for any resulting GHS labelling and SDS referenced from this site is with users. |
Updated date:
|
2016/8/17 Addition of Rationale for the classification |