GHS Classification Result

Chemical Name：Dicyanomethane; Malononitrile
CAS：109-77-3

Result：
ID: 22A4171
Classifier: Ministry of Health, Labour and Welfare （MHLW）, Ministry of the Environment （MOE）
Year Classified: FY2010
Reference Manual: GHS Classification Guidance by the Japanese Government （July, 2010）

PHYSICAL HAZARDS
Hazard class Classification Symbol Signal word Hazard statement 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 - - - - Solid (GHS definition)
3 Aerosols Not applicable - - - - Not aerosol products.
4 Oxidizing gases Not applicable - - - - Solid (GHS definition)
5 Gases under pressure Not applicable - - - - Solid (GHS definition)
6 Flammable liquids Not applicable - - - - Solid (GHS definition)
7 Flammable solids Classification not possible - - - - No data available.
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 applicable - - - - Solid (GHS definition)
10 Pyrophoric solids Not classified - - - - Since its autoignition temperature is > 365 degC (ICSC (2003)), it is considered that the substance does not ignite at room temperature.
11 Self-heating substances and mixtures Classification not possible - - - - Test methods applicable to solid (melting point <= 140 degC) 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 - - - - Solid (GHS definition)
14 Oxidizing solids Not applicable - - - - Organic compounds containing no oxygen, fluorine or chlorine.
15 Organic peroxides Not applicable - - - - Organic compounds containing no bivalent -O-O- structure.
16 Corrosive to metals Classification not possible - - - - The substance is a solid and its melting point is less than 55 degC, but classification is not possible due to lack of additional data.

HEALTH HAZARDS
Hazard class Classification Symbol Signal word Hazard statement Precautionary statement Rationale for the classification
1 Acute toxicity （Oral） Category 3 Danger H301: Toxic if swallowed P301+P310: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P264: Wash ... thoroughly after handling.
P270: Do not eat, drink or smoke when using this product.
P321: Specific treatment （see ... on this label）.
P330: Rinse mouth.
P405: Store locked up.
P501: Dispose of contents/container to ... 		Based on the rat LD50 value of 61 mg/kg (PATTY, 5th (2001)), the substance was classified as Category 3.
1 Acute toxicity （Dermal） Category 3 Danger H311: Toxic in contact with skin P302+P352: IF ON SKIN: Wash with plenty of soap and water.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P312: Call a POISON CENTER or doctor/physician if you feel unwell.
P322: Specific treatment （see ... on this label）.
P361: Remove/Take off immediately all contaminated clothing.
P363: Wash contaminated clothing before reuse.
P405: Store locked up.
P501: Dispose of contents/container to ... 		Based on the rat LD50 value of 350 mg/kg (HSDB (2003)), the substance was classified into Category 3.
1 Acute toxicity （Inhalation: Gases） Not applicable - - - - Solid (GHS definition)
1 Acute toxicity （Inhalation: Vapours） Category 1 Danger H330: Fatal if inhaled P304+P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P403+P233: Store in a well-ventilated place. Keep container tightly closed.
P260: Do not breathe dust/fume/gas/mist/vapours/spray.
P271: Use only outdoors or in a well-ventilated area.
P284: Wear respiratory protection.
P310: Immediately call a POISON CENTER or doctor/physician.
P320: Specific treatment is urgent （see ... on this label）.
P405: Store locked up.
P501: Dispose of contents/container to ... 		It was reported that 2-hour exposure to rats at the concentration of 200 - 300 mg/m3 caused 50% mortality (PATTY, 5th (2001)), namely the LC50 value was 200 - 300 mg/m3/2h (52.3 - 78.6 ppm/4hrs), therefore the substance was classified as Category 1. The LC50 value (0.2 - 0.3 mg/L) was lower than 90% of the saturated vapor pressure concentration (0.711 mg/L), the criterion values for gas were adopted.
1 Acute toxicity （Inhalation: Dusts and mists） Classification not possible - - - - No data available.
2 Skin corrosion/irritation Classification not possible - - - - No data available.
3 Serious eye damage/eye irritation Category 2 Warning H319: Causes serious eye irritation P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P337+P313: If eye irritation persists: Get medical advice/attention.
P264: Wash ... thoroughly after handling.
P280: Wear protective gloves/protective clothing/eye protection/face protection. 		Immediate irritation after exposure to the eye was reported (HSDB (2003)). And it was reported that instillation of the substance to the eyes of rabbits caused lacrimation, hyperemia of the conjunctiva, spasm and swelling of the eyelids (HSDB (2003)). Based on these documents, the substance was classified as Category 2.
4 Respiratory sensitization Classification not possible - - - - No data available.
4 Skin sensitization Classification not possible - - - - No data available.
5 Germ cell mutagenicity Classification not possible - - - - The classification was not possible due to lack of in vivo test data. As relevant information, as for in vitro study, negative results in the Ames test were reported (NTP DB (Access on Sep. 2010)).
6 Carcinogenicity Classification not possible - - - - No data available.
7 Reproductive toxicity Classification not possible - - - - No data available.
8 Specific target organ toxicity - Single exposure Category 1 (central nervous system) Danger H370: Causes damage to organs (central nervous system) P307+P311: IF exposed: Call a POISON CENTER or doctor/physician.
P260: Do not breathe dust/fume/gas/mist/vapours/spray.
P264: Wash ... thoroughly after handling.
P270: Do not eat, drink or smoke when using this product.
P321: Specific treatment （see ... on this label）.
P405: Store locked up.
P501: Dispose of contents/container to ... 		In the acute inhalation study in mice (as vapors, converted LC50 value as that of 4h-exposure: 0.141 - 0.212 mg/L), signs of restlessness appeared during exposure, and the increased respiratory rate shifted to decreased one with lethargy after exposure. The mice revealed cyanosis and incoordination of movements, and after that revealed tremors and convulsions, leading to death in some animals (PATTY, 5th (2001)). While, in the acute oral toxicity study in rats, in survived rats, brain lesions which mainly localized in the corps striatum involving both the grey and white matter were observed. In some rats, necrosis occurred in the striated neurons with the proliferation of the neuroglia cells (HSDB (2003)). Based on the information, since the effects on the central nervous system were shown and the exposure concentration corresponded to Category 1of the guidance values, the substance was classified as Category 1 (central nervous system). In addition, there was the following description: the toxic effects of cyanide ion caused suppression of cellular respiration by inactivation of cytochrome oxidase and consequently affected many organs that require and utilize a lot of oxygen by histotoxic anoxia (CICADs (J) 61 (2004)).
9 Specific target organ toxicity - Repeated exposure Classification not possible - - - - Insufficient data were available. It was reported that multiple oral administration of the substance (1 - 2 mg/kg) to rats resulted in several neuronal changes such as the development of cytoplasmic changes in the neuron (HSDB (2003)), however, the details of the study were unknown.
10 Aspiration hazard Classification not possible - - - - No data available.

ENVIRONMENTAL HAZARDS
Hazard class Classification Symbol Signal word Hazard statement Precautionary statement Rationale for the classification
11 Hazardous to the aquatic environment （Acute） Category 1 Warning H400: Very toxic to aquatic life P273: Avoid release to the environment.
P391: Collect spillage.
P501: Dispose of contents/container to ... 		Classified into Category 1 from its 96h-LC50 = 0.56 mg/L for fish (Pimephales promelas) (HSDB, 2003).
11 Hazardous to the aquatic environment （Long-term） Category 1 Warning H410: Very toxic to aquatic life with long lasting effects P273: Avoid release to the environment.
P391: Collect spillage.
P501: Dispose of contents/container to ... 		Classified into Category 1 since its acute toxicity is Category 1 and data on rapid degradation are not available.
12 Hazardous to the ozone layer Classification not possible - - - - This substance is not listed in Annexes to the Montreal Protocol.


NOTE:
* 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.

Reference：
Reference Manual
Definitions / Abbreviations
Model Label by MHLW

 MHLW Website （in Japanese Only）
Model SDS by MHLW

 MHLW Website （in Japanese Only）

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