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Opis
Barium Chromate
Other Names: Barium tetraoxochromate(VI), Chromic acid barium salt
CAS Number: 10294-40-3
Sum Formula: BaCrO₄
Molar Mass: 253.32 g/mol
Appearance: Yellow crystalline powder
Barium chromate is an inorganic compound composed of barium and chromate ions. It is known for its bright yellow color and is used in specialized industrial applications, primarily involving pigments, corrosion resistance, and pyrotechnics.
Chemical and Physical Properties
Density: 4.5 g/cm³
Melting Point: Decomposes at ~210°C
Boiling Point: Not applicable (decomposes)
Solubility in Water: Very slightly soluble (0.00025 g/100 mL at 20°C)
Solubility in Other Solvents: Insoluble in alcohol and most organic solvents
Odor: Odorless
Applications
Pigments: Used in corrosion-resistant paints and primers, particularly in aerospace and automotive sectors.
Pyrotechnics: Employed in the formulation of delay fuses and signal compositions.
Analytical Chemistry: Used in qualitative analysis and as a reagent for chemical detection.
Ceramics and Glass: Sometimes used to impart color or specific chemical properties to materials.
Safety
Signal Word: Danger
H272 (14.8%): May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]
H301+H311 (20.4%): Toxic if swallowed or in contact with skin [Danger Acute toxicity, oral; acute toxicity, dermal]
H301 (23.3%): Toxic if swallowed [Danger Acute toxicity, oral]
H302 (72.4%): Harmful if swallowed [Warning Acute toxicity, oral]
H311 (23.5%): Toxic in contact with skin [Danger Acute toxicity, dermal]
H317 (38.3%): May cause an allergic skin reaction [Warning Sensitization, Skin]
H330 (23.3%): Fatal if inhaled [Danger Acute toxicity, inhalation]
H332 (70%): Harmful if inhaled [Warning Acute toxicity, inhalation]
H334 (26.7%): May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
H340 (23.5%): May cause genetic defects [Danger Germ cell mutagenicity]
H350 (34%): May cause cancer [Danger Carcinogenicity]
H361fd (20.2%): Suspected of damaging fertility; Suspected of damaging the unborn child [Warning Reproductive toxicity]
H372 (24.7%): Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
H400 (33.5%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
H410 (35.8%): Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]
P203, P210, P220, P233, P260, P261, P262, P264, P270, P271, P272, P273, P280, P284, P301+P316, P301+P317, P302+P352, P304+P340, P316, P317, P318, P319, P320, P321, P330, P333+P317, P342+P316, P361+P364, P362+P364, P370+P378, P391, P403, P403+P233, P405, and P501
Handling and Storage
Storage Conditions: Store in a tightly sealed container in a dry, cool, and well-ventilated area, away from incompatible materials such as strong acids and reducing agents.
Handling Precautions: Avoid generating dust. Use only with proper ventilation and appropriate personal protective equipment. Treat as a potential carcinogen and reproductive toxin.