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Sodium chromate

CAS Number
7775-11-3
EC Number
231-889-5
Chemical Formula
CrH2O4.2Na
Molecular Weight
161.973 g/mol

Description

Sodium chromate (CAS 7775-11-3 ) is an inorganic chromium(VI) salt used industrially as a corrosion inhibitor and oxidizing agent across metal processing, textile, and water treatment sectors. Disodium chromate is a recognized alternative name buyers may encounter in technical procurement contexts. In metal finishing and mining operations, it functions as a passivation agent applied to steel surfaces. It is used on non-ferrous surfaces to prevent oxidative degradation in aggressive environments. The textile and leather industries use it as a mordant in dyeing processes, fixing chromium-based dyes to fiber substrates. This application ensures improved color fastness and durability for various materials. In industrial water treatment systems, particularly cooling towers, it inhibits corrosion of metal infrastructure by forming a protective film. This film on pipe surfaces protects recirculating water circuits from damage. Paper manufacturing operations also employ it as an oxidizing agent in certain pulp treatment and surface chemistry processes. The product is supplied as a yellow crystalline powder or anhydrous solid, with the tetrahydrate form also available. Technical grade is the standard commercial offering for most industrial end uses. Buyers should confirm purity specifications and chromium(VI) content with suppliers. These requirements often vary significantly between industrial and process-specific grades depending on the final application. Contact us for supply of Sodium chromate Request Quote

Other Names (Synonyms)

sodium chromate(VI) | H2CrO4 | disodium chromate | chromiumsodium oxide | chromium disodium oxide | chromic acid, disodium salt | Chromate of soda | Neutral sodium chromate

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point792 °C
Density2.72 g/cm³
AppearanceSodium chromate, including the hexahydrate, is yellow crystalline solids that can also be used in solution. Disodium dichromate (10588-01-9):
ColorYellow
FormSolid
Water Solubility530 G/L (20 ºC)

Safety & Handling

Danger
GHS05· CorrosiveGHS06· ToxicGHS08· Health HazardGHS09· EnvironmentGHS07· Irritant

Hazard Statements

H300
H300
H301
H301
H312
H312
H314
H314
H317
H317
H318
H318
H330
H330
H334
H334
H340
H340
H341
H341
H350
H350
H360
H360
H370
H370
H372
H372
H400
H400
H410H410

Precautionary Statements

P203
P203
P233
P233
P260
P260
P261
P261
P264
P264
P270
P270
P271
P271
P272
P272
P273
P273
P280
P280
P284
P284
P316
P316
P317
P317
P318
P318
P319
P319
P320
P320
P321
P321
P330
P330
P363
P363
P391
P391
P403
P403
P405
P405
P501
P501
P265
P265
P316
P316
P352
P352
P340
P340
P316
P316
P317
P317
P316
P316
P364
P364
P233
P233
P331
P331
P354
P354
P338

Trade & Regulatory

HS Code28415000
UN Number3288
ADR Class6.1
Packing GroupII
Storage Class6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials
WGK (Germany)3