GHS Classification Result

Chemical Name:Cobalt oxide
CAS:1307-96-6

Result:
ID: 390
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 "solid" according to GHS definition
3 Aerosols Not applicable - - - - Not aerosol products
4 Oxidizing gases Not applicable - - - - Classified as "solid" according to GHS definition
5 Gases under pressure Not applicable - - - - Classified as "solid" according to GHS definition
6 Flammable liquids Not applicable - - - - Classified as "solid" according to GHS definition
7 Flammable solids Not classified - - - - Non-flammable (ICSC, 2004)
8 Self-reactive substances and mixtures Not applicable - - - - Containing no chemical groups with explosive or self-reactive properties
9 Pyrophoric liquids Not applicable - - - - Classified as "solid" according to GHS definition
10 Pyrophoric solids Not classified - - - - Non-combustible (ICSC, 2004)
11 Self-heating substances and mixtures Not classified - - - - Non-combustible (ICSC, 2004)
12 Substances and mixtures which, in contact with water, emit flammable gases Not classified - - - - Stable to water (insoluble, ICSC (2004))
13 Oxidizing liquids Not applicable - - - - Classified as "solid" according to GHS definition
14 Oxidizing solids Classification not possible - - - - Classification not possible due to the absence of data, though being inorganic compounds containing oxygen.
15 Organic peroxides Not applicable - - - - Not organic compounds
16 Corrosive to metals Classification not possible - - - - Test methods applicable to solid substances are not available

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 (oral route) value of 159mg/kg (ATSDR (2004))
1 Acute toxicity (Dermal) Classification not possible - - - - No data available
1 Acute toxicity (Inhalation: Gases) Not applicable - - - - Due to the fact that the substance is "solid" according to the GHS definition and inhalation of its gas is not expected.
1 Acute toxicity (Inhalation: Vapours) Classification not possible - - - - No data available
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 Classification not possible - - - - No data available
4 Respiratory sensitization Category 1 Danger H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled P304+P341: IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.
P342+P311: If experiencing respiratory symptoms: Call a POISON CENTER or doctor/physician.
P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
P285: In case of inadequate ventilation wear respiratory protection.
P501: Dispose of contents/container to ...
Based on epidemiological cases; cobalt blue (cobalt oxide), which is generally used as a pigment to colour porcelain, causes respiratory sensitization in humans. Moreover, cobalt is classified into "Respiratory Sensitizing Substance: Group 1" by the Japan Society for Occupational Health. This classification, though not specifying cobalt oxide (II), seems to include cobalt compounds. * There is a provision to the effect that "the category refers to the substance concerned and its compounds, but does not identify all substances causing respiratory/skin sensitization.
4 Skin sensitization Category 1 Warning H317: May cause an allergic skin reaction P302+P352: IF ON SKIN: Wash with plenty of soap and water.
P333+P313: If skin irritation or rash occurs: Get medical advice/attention.
P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
P272: Contaminated work clothing should not be allowed out of the workplace.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P321: Specific treatment (see ... on this label).
P363: Wash contaminated clothing before reuse.
P501: Dispose of contents/container to ...
Cobalt is classified into "Skin Sensitizing Substance: Group 1" by the Japan Society for Occupational Health. This classification, though not specifying cobalt oxide (II), seems to include cobalt compounds. Cobalt oxide (II), which is a cobalt compound, should thus cause skin sensitization. * There is a provision to the effect that "the category refers to the substance concerned and its compounds, but does not identify all substances causing respiratory/skin sensitization.
5 Germ cell mutagenicity Classification not possible - - - - No data available
6 Carcinogenicity Category 2 Warning H351: Suspected of causing cancer P308+P313: IF exposed or concerned: Get medical advice/attention.
P201: Obtain special instructions before use.
P202: Do not handle until all safety precautions have been read and understood.
P281: Use personal protective equipment as required.
P405: Store locked up.
P501: Dispose of contents/container to ...
Due to the fact that the substance is classified as A3 (as cobalt and inorganic compounds) by ACGIH (2001), Group 2B (as cobalt and cobalt compounds) by IARC (1991) and 2B (as cobalt and cobalt compounds) by the Japan Society for Occupational Health.
7 Reproductive toxicity Classification not possible - - - - No data available As for the health hazards, refer to "ID119, Cobalt, CAS: 7440-48-4."
8 Specific target organ toxicity - Single exposure Category 1 (liver), Category 2 (heart) Danger
Warning
H370: Causes damage to organs (liver)
H371: May cause damage to organs (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 ...
P309+P311: IF exposed or if you feel unwell: Call a POISON CENTER or doctor/physician.
Based on the evidence from animal studies including "hyperplasia of interstitial cells of the heart, myofiber hypertrophy/degeneration, hyperemia of the liver, organic changes of hepatocytes" (ATSDR (2004)). The effects on the heart were observed at dosing levels within the guidance value ranges for Category 2, while the effects on the liver for Category 1.
9 Specific target organ toxicity - Repeated exposure Classification not possible - - - - No data available
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) Classification not possible - - - - No data available
11 Hazardous to the aquatic environment (Long-term) Classification not possible - - - - No data available


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)


To GHS Information