Calcium wolframate

GHS

General Information

Name:

Calcium wolframate

Remarks:

Conclusions on classification:
Regarding the classification as "hazardous to the aquatic environment", aquatic toxicity studies with calcium wolframate are not available, thus aquatic toxicity is addressed with existing data on the dissociation products calcium cations and wolframate anions (see also endpoint summary "Aquatic toxicity"). 

Acute toxicity: Calcium is naturally ubiquitous in the environment and essential for living organisms with a very low potential for toxicity to freshwater and saltwater organisms. Adverse effects are lacking up to and including the respective OECD/EC guidelines limit concentrations. Reliable acute aquatic toxicity data of wolframate are available from guideline studies for algae and daphnia, and are well above the classification cut-off for acute (short-term) aquatic hazard category 1.

Therefore, calcium wolframate does not meet classification criteria as short-term hazard to the aquatic environment under Regulation (EC) No 1272/2008.

Long-term toxicity: Calcium is naturally ubiquitous in the environment and essential for living organisms with a very low potential for toxicity to freshwater and saltwater organisms Chronic aquatic toxicity data of wolframate are available from a guideline studies for algae, and the 72-h NOErC and ErC10 values for the inhibition of growth rate of P. subcapitata were estimated with <10.9 mg sodium wolframate/L. Since the corresponding EC50 value is > 50 mg/L, we may assume that the respective EC10 value is > 1 mg/L and above the classification cut-off values for long-term aquatic hazard category 1 -3. Since the wolframate content of sodium and calcium wolframate is comparable and sodium wolframate (742 g/L in water; CRC handbook, 2008) is more soluble than calcium wolframate (6.4 mg/L in water), the effect concentrations are considered a conservative estimate for calcium woframate. Criteria for classification in category 4 are also not met.

Thus, calcium wolframate does not meet classification criteria as acute and long-term hazard to the aquatic environment under Regulation (EC) No 1272/2008 and subsequent adaptations.

Classification

Physical hazards

Explosives

Reason for no classification:

data conclusive but not sufficient for classification

Flammable gases and chemically unstable gases

Reason for no classification:

data conclusive but not sufficient for classification

Aerosols

Reason for no classification:

data conclusive but not sufficient for classification

Reason for no classification:

hazard class not assessed

Oxidising gases

Reason for no classification:

data conclusive but not sufficient for classification

Gases under pressure

Reason for no classification:

data conclusive but not sufficient for classification

Flammable liquids

Reason for no classification:

data conclusive but not sufficient for classification

Flammable solids

Reason for no classification:

data conclusive but not sufficient for classification

Self-reactive substances and mixtures

Reason for no classification:

data conclusive but not sufficient for classification

Pyrophoric liquids

Reason for no classification:

data conclusive but not sufficient for classification

Pyrophoric solids

Reason for no classification:

data conclusive but not sufficient for classification

Self-heating substances and mixtures

Reason for no classification:

data conclusive but not sufficient for classification

Substances and mixtures which in contact with water emit flammable gases

Reason for no classification:

data conclusive but not sufficient for classification

Oxidising liquids

Reason for no classification:

data conclusive but not sufficient for classification

Oxidising solids

Reason for no classification:

data conclusive but not sufficient for classification

Organic peroxides

Reason for no classification:

data conclusive but not sufficient for classification

Corrosive to metals

Reason for no classification:

data conclusive but not sufficient for classification

Desensitized explosives

Reason for no classification:

data conclusive but not sufficient for classification

Health hazards

Acute toxicity - oral

Reason for no classification:

data conclusive but not sufficient for classification

Acute toxicity - dermal

Reason for no classification:

data conclusive but not sufficient for classification

Acute toxicity - inhalation

Reason for no classification:

data conclusive but not sufficient for classification

Skin corrosion / irritation

Reason for no classification:

data conclusive but not sufficient for classification

Serious eye damage / eye irritation

Reason for no classification:

data conclusive but not sufficient for classification

Respiratory sensitisation

Reason for no classification:

data conclusive but not sufficient for classification

Skin sensitisation

Reason for no classification:

data conclusive but not sufficient for classification

Aspiration hazard

Reason for no classification:

data conclusive but not sufficient for classification

Reproductive toxicity

Reason for no classification:

data conclusive but not sufficient for classification

Effects on or via lactation

Reason for no classification:

data conclusive but not sufficient for classification

Germ cell mutagenicity

Reason for no classification:

data conclusive but not sufficient for classification

Carcinogenicity

Reason for no classification:

data conclusive but not sufficient for classification

1. Specific target organ toxicity - single (STOT-SE)

Reason for no classification:

data conclusive but not sufficient for classification

1. Specific target organ toxicity - repeated (STOT-RE)

Reason for no classification:

data conclusive but not sufficient for classification

Environmental hazards

Hazardous to the aquatic environment (acute / short-term)

Reason for no classification:

data conclusive but not sufficient for classification

Hazardous to the aquatic environment (long-term)

Reason for no classification:

data conclusive but not sufficient for classification

Hazardous to the ozone layer

Reason for no classification:

data conclusive but not sufficient for classification

Labelling

Signal word:

No signal word