Barium chromate


Barium chromate Basic information
Product Name:Barium chromate
Synonyms:Barium cromate;Barium Chromate, Puratronic (Metals Basis);Barium chromate: chromic acid, barium salt;BARIUM CHROMATE;c.i.77103;c.i.pigmentyellow31;Chromic acid (H2-CrO4), barium salt (1:1);Chromic acid, barium salt (1:1)
CAS:10294-40-3
MF:BaCrO4
MW:253.3207
EINECS:233-660-5
Product Categories:Inorganics;Barium Salts;BariumMetal and Ceramic Science;Inorganic Salts;Salts;Synthetic Reagents;Industrial/Fine Chemicals
Mol File:10294-40-3.mol
Barium chromate Structure
Barium chromate Chemical Properties
Melting point 210 °C (dec.) (lit.)
density 4.5 g/mL at 25 °C (lit.)
form Powder
Specific Gravity4.5
color Yellow
Water Solubility Insoluble in water. Soluble in strong acids.
Merck 14,972
Solubility Product Constant (Ksp)pKsp: 9.93
Exposure limitsOSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3
Stability:Stable. Oxidizer. May react vigorously with reducing agents.
InChIKeyQFFVPLLCYGOFPU-UHFFFAOYSA-N
CAS DataBase Reference10294-40-3(CAS DataBase Reference)
NIST Chemistry Referencebarium chromate(VI)(10294-40-3)
EPA Substance Registry SystemBarium chromate (10294-40-3)
Safety Information
Hazard Codes O,T,N,Xn
Risk Statements 49-8-20/22-43-50/53
Safety Statements 53-36/37-45-60-61-28
RIDADR UN 1479 5.1/PG 2
WGK Germany 3
RTECS CQ8760000
TSCA Yes
HazardClass 5.1
PackingGroup III
Hazardous Substances Data10294-40-3(Hazardous Substances Data)
Toxicitysce-ham:ovr 100 mg/L MUREAV 156,219,85
MSDS Information
ProviderLanguage
SigmaAldrichEnglish
ALFAEnglish
Barium chromate Usage And Synthesis
Chemical PropertiesBarium chromate is a heavy, yellow powder(s); rhomb, monoclinic; prepared from BaCl2 and Na2CrO4 solutions, followed by filtering resulting precipitate; used in safety matches, as a corrosion inhibitor.[MER06] [HAW93]
Physical propertiesYellow orthorhombic crystal; density 4.50 g/cm3; darkens on heating; insoluble in water and organic solvents; dissolves in mineral acid with decomposition.
UsesBarium chromate has been found to be useful in many capacities. It is an oxidizing agent, making it useful as a burn rate modifier in pyrotechnic compositions. It is especially useful in delay compositions such as delay fuses. Barium chromate is used as a pigment, oxidizing agent, colorant in glass, and sulfate scavenger in chromium electroplating baths, ceramics, and porcelain. It acts as a corrosion inhibitor in jointing pastes and metal primers. Further, it is used in fuses, safety matches, ignition control devices and high-temperature batteries. In addition to this, it is used as a carrier for the chromium ions and useful as a burn rate modifier in pyrotechnic compositions. It is involved as a catalyst in the alkane dehydration reaction.
ApplicationBarium chromate is an oxidizing chemical compound composed of the elements barium and chromium. It is a pigment almost entirely in anticorrosion jointing pastes to prevent electro-chemical corrosion at junctions of dissimilar metals; some use in artists’ colors and in coloring glass, ceramics, porcelain. Also used in metal primers, pyrotechnic compositions.
PreparationInteraction of barium chloride and sodium chromate. The precipitate is washed, filtered and dried.
BaCl2+Na2CrO4→BaCrO4↓+2NaCl
HazardConfirmed carcinogen.
Safety ProfileConfirmed human carcinogen. A poison. Mutation data reported. Reacts vigorously with reducing materials. See also BARIUM COMPOUNDS (soluble) and CHROMIUM COMPOUNDS. Used in pyrotechnics and as an explosive initiator.
Barium chromate Preparation Products And Raw materials
Raw materialsSodium dichromate dihydrate–>Potassium dichromate–>Barium sulfate–>Barium hydroxide–>Barium chloride–>Barium hydroxide octahydrate–>Filter press–>Zinc chromate
Preparation ProductsBarium sulfate

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