Barium chromate Chemical Properties

Melting point:

210 °C (dec.) (lit.)

Density 

4.5 g/mL at 25 °C (lit.)

solubility 

reacts with acid solutions

form 

Powder

Specific Gravity

4.5

color 

Yellow

Water Solubility 

Insoluble in water. Soluble in strong acids.

Merck 

14,972

Solubility Product Constant (Ksp)

pKsp: 9.93

Exposure limits

OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3

Stability:

Stable. Oxidizer. May react vigorously with reducing agents.

InChIKey

QFFVPLLCYGOFPU-UHFFFAOYSA-N

CAS DataBase Reference

10294-40-3(CAS DataBase Reference)

NIST Chemistry Reference

barium chromate(VI)(10294-40-3)

EPA Substance Registry System

Barium 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 Data

10294-40-3(Hazardous Substances Data)

Toxicity

sce-ham:ovr 100 mg/L MUREAV 156,219,85

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Barium chromate Usage And Synthesis

Chemical Properties

Barium 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 properties

Yellow orthorhombic crystal; density 4.50 g/cm³; darkens on heating; insoluble in water and organic solvents; dissolves in mineral acid with decomposition.

Uses

Barium 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.

Application

Barium 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.

Preparation

Interaction of barium chloride and sodium chromate. The precipitate is washed, filtered and dried.
BaCl2+Na2CrO4→BaCrO4↓+2NaCl

Hazard

Confirmed carcinogen.

Safety Profile

Confirmed 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(10294-40-3)Related Product Information

• Barium sulfate
• Potassium chromate
• Barium
• Calcium nitrate
• Calcium oxide
• Hydroxyapatite
• Manganese sulfide
• CADMIUM HYDROXIDE
• Barium iodide
• Pigment Yellow 3
• BARIUM HYDRIDE
• chromium dioxide
• Chromic acid
• Sodium dichromate dihydrate
• Barium dichomate
• Barium chromate(V).
• Barium dichromare
• Barium chromate