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HomeProduct name listSodium chromate tetrahydrate

Sodium chromate tetrahydrate

  • CAS NO.:10034-82-9
  • Empirical Formula: CrH5NaO5
  • Molecular Weight: 160.02
  • MDL number: MFCD00149167
  • EINECS: 600-068-7
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-10-17 17:11:57
Sodium chromate tetrahydrate Structural

What is Sodium chromate tetrahydrate?

Chemical properties

yellow deliquescent crystals

Chemical properties

Sodium cyanide is found as white granules, flakes or lumps. Sodium cyanide is shipped as pellets or briquettes. Odorless when dry. It absorbs water from air (is hygroscopic or deliquescent). Hydrogen cyanide gas released by sodium cyanide has a distinctive mild, bitter almond odor, but a large proportion of people cannot detect it; the odor does not provide adequate warning of hazardous concentrations.

Chemical properties

Sodium chromate, including the hexahydrate, is yellow crystalline solids that can also be used in solution. Disodium dichromate (10588-01-9):

The Uses of Sodium chromate tetrahydrate

Corrosion inhibitor, pigment manufactureSodium chromate tetrahydrate is used as a corrosion inhibitor, wood preservative and an auxiliary in textile industry. It serves as an oxidant, which is used to prepare carboxylic acids and ketones from primary and secondary alcohols respectively. Further, it is used as a starting material to prepare other chromium compounds and as a catalyst in organic synthesis especially pharmaceuticals and agro chemicals.

The Uses of Sodium chromate tetrahydrate

Sodium chromate tetrahydrate can be used as an oxidant in organic synthesis and also as a carrier electrolyte in the capillary electrophoresis.

General Description

Odorless bright yellow deliquescent crystals. Aqueous solutions are alkaline.

Air & Water Reactions

Deliquescent. Water soluble.

Reactivity Profile

Sodium chromate tetrahydrate is a strong oxidizing agent. Incompatible with strong acids . Contact with combustible materials may lead to a fire. Toxic chromium oxide fumes may form in fire [USCG, 1999].

Fire Hazard

Literature sources indicate that Sodium chromate tetrahydrate is nonflammable.

Potential Exposure

Used to make dyes, inks, pigments, and other chromates; in leather tanning, a corrosion inhibitor in circulating water systems; metal treatment; a drilling mud additive; chemical intermediate for chromium catalysts; colorimetry, oxidizing agent; bleaching agent; an algicide, fungicide, insecticide; in wood preservation.

Shipping

UN3087 Oxidizing solid, toxic, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, 6.1-Poisonous materials, Technical Name Required. UN3085 Oxidizing solid, corrosive, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, 8-Corrosive material, Technical Name Required.

Purification Methods

Crystallise the chromate from hot water (0.8mL/g). It is deliquescent.

Incompatibilities

Sodium cyanide decomposes on contact with acids, acid salts, water, moisture, alcohols, and carbon dioxide, releasing highly toxic and flammable hydrogen cyanide gas. Aqueous solution is a strong base; it reacts violently with acid and is corrosive. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Absorbs moisture from the air forming a corrosive syrup. Corrosive to active metals, such as aluminum, copper, and zinc. Under acid conditions, sarin hydrolyzes to form hydrofluoric acid.

Waste Disposal

Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office. Add strong alkaline hypochlorite and react for 24 hours. Then flush to sewer with large volumes of water.

Properties of Sodium chromate tetrahydrate

Melting point: 792℃
Density  2.73
solubility  slightly soluble in ethanol
form  Crystals
color  Yellow
Odor Odorless
PH pH (10g/l, 25℃) : 8.0~10.0
Water Solubility  Soluble in water.
Sensitive  Hygroscopic
Merck  14,8601
Exposure limits ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin)
OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3
Stability: Stable. Incompatible with strong reducing agents, combustible materials, strong acids. Deliquescent.
CAS DataBase Reference 10034-82-9(CAS DataBase Reference)
EPA Substance Registry System Sodium chromate(VI), tetrahydrate (10034-82-9)

Safety information for Sodium chromate tetrahydrate

Signal word Danger
Pictogram(s)
ghs
Corrosion
Corrosives
GHS05
ghs
Skull and Crossbones
Acute Toxicity
GHS06
ghs
Health Hazard
GHS08
ghs
Environment
GHS09
GHS Hazard Statements H301:Acute toxicity,oral
H312:Acute toxicity,dermal
H314:Skin corrosion/irritation
H317:Sensitisation, Skin
H330:Acute toxicity,inhalation
H334:Sensitisation, respiratory
H340:Germ cell mutagenicity
H350:Carcinogenicity
H372:Specific target organ toxicity, repeated exposure
H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P260:Do not breathe dust/fume/gas/mist/vapours/spray.
P273:Avoid release to the environment.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for Sodium chromate tetrahydrate

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