GHS Classification Result

Chemical Name:Hydrogen cyanide
CAS:74-90-8

Result:
ID: 27
Classifier: Inter-ministerial Committee on GHS
Year Classified: FY2006
Reference Manual: GHS Classification Manual (10 Feb, 2006)

PHYSICAL HAZARDS
Hazard class Classification Symbol Signal word Hazard statement Precautionary statement Rationale for the classification
1 Explosives Not applicable - - - - Containing no chemical groups with explosive properties
2 Flammable gases (including chemically unstable gases) Not applicable - - - - Classified as "liquid" according to GHS definition
3 Aerosols Not applicable - - - - Not aerosol products
4 Oxidizing gases Not applicable - - - - Classified as "liquid" according to GHS definition
5 Gases under pressure Not applicable - - - - Classified as "liquid" according to GHS definition
6 Flammable liquids Category 1 Danger H224: Extremely flammable liquid and vapour P303+P361+P353: IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.
P370+P378: In case of fire: Use ... for extinction.
P403+P235: Store in a well-ventilated place. Keep cool.
P210: Keep away from heat/sparks/open flames/hot surfaces. - No smoking.
P233: Keep container tightly closed.
P240: Ground/bond container and receiving equipment.
P241: Use explosion-proof electrical/ventilating/lighting/.../equipment.
P242: Use only non-sparking tools.
P243: Take precautionary measures against static discharge.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P501: Dispose of contents/container to ...
The flash point is -18degC (c.c.) and the boiling point is 26degC (ICSC, 2003). Those containing stabilizers (water content: less than 3% by mass) are classified into Class 3 and Division 6.1 (UN#1051) by the UN Recommendations on the Transport of Dangerous Goods.
7 Flammable solids Not applicable - - - - Classified as "liquid" according to GHS definition
8 Self-reactive substances and mixtures Not applicable - - - - Containing no chemical groups with explosive or self-reactive properties
9 Pyrophoric liquids Not classified - - - - Not pyrophoric when in contact with air at ordinary temperatures: the auto-ignition temperature is 538degC (ICSC, 2003)
10 Pyrophoric solids Not applicable - - - - Classified as "liquid" according to 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 - - - - Containing no metals or metalloids (B, Si, P, Ge, As, Se, Sn, Sb, Te, Bi, Po, At)
13 Oxidizing liquids Not applicable - - - - Organic compounds containing no oxygen, fluorine and chlorine
14 Oxidizing solids Not applicable - - - - Classified as "liquid" according to GHS definition
15 Organic peroxides Not applicable - - - - Organic compounds containing no "-O-O-" structure
16 Corrosive to metals Classification not possible - - - - No data available. Those containing stabilizers (water content: less than 3% by mass) are classified into Class 3 and Division 6.1 (UN#1051) (UN Recommendations on the Transport of Dangerous Goods).

HEALTH HAZARDS
Hazard class Classification Symbol Signal word Hazard statement Precautionary statement Rationale for the classification
1 Acute toxicity (Oral) Category 1 Danger H300: Fatal 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 (oral route) value of 4.2mg/kg (CICAD 61 (2004)).
1 Acute toxicity (Dermal) Category 1 Danger H310: Fatal in contact with skin P302+P350: IF ON SKIN: Gently wash with plenty of soap and water.
P262: Do not get in eyes, on skin, or on clothing.
P264: Wash ... thoroughly after handling.
P270: Do not eat, drink or smoke when using this product.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P310: Immediately call a POISON CENTER or doctor/physician.
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 rabbit LD50 (dermal route) value of 6.8mg/kg (CICAD 61 ( 2004)).
1 Acute toxicity (Inhalation: Gases) Not applicable - - - - Due to the fact that the substance is "liquid" according to the GHS definition and inhalation of its gas is not expected.
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 ...
Based on the rat LC50 value of 50.2ppm (4 hours), calculated from the testing data of rat LC50 (inhalation of vapour: GHS definition) of 142ppm (30 minutes) (CERI Hazard Data 2001-38 (2002)), was lower than 90% of the saturated vapour concentration (9,980ppm) under a saturated vapour pressure of 98.9kPa (742 mmHg, 25degC) (CERI Hazard Data 2001-38 (2002)), the substance was considered as "vapour containing substantially no mist" and was classified based on standard values expressed in ppm.
1 Acute toxicity (Inhalation: Dusts and mists) Classification not possible - - - - No data available
2 Skin corrosion/irritation Classification not possible - - - - Clinical effects described in some case reports include "mild skin burns" in test animals (CICAD 61, 2004) and "skin irritation" in humans (HSDB, 2005). However, neither is the description of test results, and there is a provision that the substance "may be" irritating. Given these uncertainties, it was decided not to use these specific observations for classification.
3 Serious eye damage/eye irritation Category 2A-2B 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.
Clinical effects described in some human case reports include "IRRITATION OF EYE, CONJUNCTIVITIS" (HSDB, 2005); "There may also be irritation from skin and eye contact with the liquid" (HSDB, 2005)). However, neither is the description of test results, and the severity of effects is not provided. Although classified into Category 2A-2B, it should be placed in Category 2A from the viewpoint of safety, if further subclassification is needed.
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 - - - - Based on the absence of data on multi-generation mutagenicity tests, germ/somatic cell mutagenicity tests in vivo and germ/somatic cell genotoxicity tests in vivo, and no strong positive data on mutagenicity tests in vitro (several indices), described in CERI Hazard Data (2002) and CICAD 61 (2004).
6 Carcinogenicity Classification not possible - - - - No data available
7 Reproductive toxicity Classification not possible - - - - Insufficient data available
8 Specific target organ toxicity - Single exposure Category 1 (central nervous system, respiratory system, heart) Danger H370: Causes damage to organs (central nervous system, respiratory system, heart) 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 ...
Based on the human evidence including "coma" (HSDB (2000)), "dizziness, hypopnea, sense of instability, headache and nausea" (ACGIH (7th, 2001)), and the evidence from animal studies including "mild adverse effects on the central nervous system" (CICAD 61 (2004)), "dyspnea, bradycardia, arrhythmia, abnormal T wave during the diastolic period, clouding of consciousness and interruption of breathing, EEG fluctuations, dyspnea, coma, debility, gait disturbance and spasm" (CERI Hazard Data 2001-38 (2002)). The effects on experimental animals were observed at dosing levels within the guidance value ranges for Category 1.
9 Specific target organ toxicity - Repeated exposure Category 1 (central nervous system) Danger H372: Cause damage to organs through prolonged or repeated exposure (central nervous system) 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.
P314: Get medical advice/attention if you feel unwell.
P501: Dispose of contents/container to ...
Based on the human evidence including "abnormalities in the scores of long term memory, visual ability, visual learning, psychomotor functions" (CICAD 61 (2004)) and "headache, debility, dysgeusia and dysosmia" (IRIS (2002)).
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 ...
It was classified into Category 1 from 96 hours LC50=0.028mg/L of the fish (Rainbow Trout) (CERI Hazard Data, 2002).
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 ...
Since acute toxicity was Category 1 and an underwater action and bio-accumulation were unknown, it was classified into Category 1.


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 SDS by MHLW

MHLW Website (in Japanese Only)


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