GHS Classification Result

Chemical Name：hafnium
CAS：7440-58-6

Result：
ID: 893
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 - - - - There are no chemical groups associated with explosive properties present in the molecules.
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 - - - - Although 25% or more of hydrated powder is classified into UNRTDG class 4.1, combustibility changes with production process and particle sizes. And it cannot be judged without performing defined test on the corresponding production process and the particle diameter of hafnium powder.
8 Self-reactive substances and mixtures Not applicable - - - - There are no chemical groups associated with explosive or self-reactive properties present in the molecule.
9 Pyrophoric liquids Not applicable - - - - Solid (GHS definition)
10 Pyrophoric solids Classification not possible - - - - Although dry powder is classified into UNRTDG Class 4.2, the property could remarkably change according to its particle diameter, etc. So it cannot be judged unless the specified test is performed on real samples.
11 Self-heating substances and mixtures Classification not possible - - - - Although dryness powder is classified into the UNRTDG class 4.2, property changes with particle diameter etc. remarkably. So it cannot be judged without a set test of real samples.
12 Substances and mixtures which, in contact with water, emit flammable gases Classification not possible - - - - Although there is the information on the flammability of moistened article (Bretherick (J) (5th, 1998) p607), no data based on a set test method.
13 Oxidizing liquids Not applicable - - - - Solid (GHS definition)
14 Oxidizing solids Not applicable - - - - Containing no oxygen , chlorine and fluorine.
15 Organic peroxides Not applicable - - - - Inorganic substance
16 Corrosive to metals Classification not possible - - - - Liquid at a test temperature, 55degC. 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） Classification not possible - - - - No data available
1 Acute toxicity （Dermal） Classification not possible - - - - No data available
1 Acute toxicity （Inhalation: Gases） Not applicable - - - - Solid (GHS definition)
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 - - - - Classification not possible due to lack of data
3 Serious eye damage/eye irritation Classification not possible - - - - Insufficient data available.
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 - - - - No data available
6 Carcinogenicity Classification not possible - - - - No data available
7 Reproductive toxicity Classification not possible - - - - No data available
8 Specific target organ toxicity - Single exposure Classification not possible - - - - Insufficient data available.
9 Specific target organ toxicity - Repeated exposure Hafnium and its compounds, Category 2 (liver) Warning H373: May cause damage to organs through prolonged or repeated exposure (liver) P260: Do not breathe dust/fume/gas/mist/vapours/spray.
P314: Get medical advice/attention if you feel unwell.
P501: Dispose of contents/container to ... 		As the information including toxicity test data in laboratory animals by repeated exposures of hafnium, and occupational exposures or epidemiological surveys and case reports etc. in humans have not been obtained, it was not able to be classified. On the other hand, in the 90-days feeding administration tests to the rat of hafnium tetrachloride, as the effects on the livers of the some animals of the 1000 ppm (equivalent for 50mg/kg/day) group, and the most animals of the 10000 ppm (equivalent for 500mg/kg/day) groups are observed (ACGIH 7th, 2001), in ACGIH, the recommended value of acceptable concentrations of hafnium and its compound is set as 0.5 mg/m3. Since the recommended value of acceptable concentrations of hafnium and its compound is set, there are histories which considered them as "the Hazardous Materials. Requiring Notification" provided in the 1st clause of Article 57-2 of the industrial safety and health laws. In consideration of the above histories, in the above tests which are made into the basis for setting of recommended value of acceptable concentrations by ACGIH, based on the description that the effects on the liver were observed in the 1000 ppm group in the Category 2 guidance value range (ACGIH 7th, 2001), it was classified into Category 2 (liver) about hafnium and its compound.
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 SDS by MHLW

 MHLW Website （in Japanese Only）

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