Sodium bromate Property

Melting point:

755 °C(lit.)

Boiling point:

1390 °C

Density 

3.339 g/mL at 25 °C (lit.)

vapor pressure 

1 mm Hg ( 806 °C)

refractive index 

1.594

storage temp. 

Store below +30°C.

solubility 

H₂O: 1 M at 20 °C, clear, colorless

form 

Powder/Solid

Specific Gravity

3.34

color 

White

PH Range

5 - 9

PH

5.0-9.0 (25℃, 50mg/mL in H2O)

Water Solubility 

364 g/L (20 ºC)

Merck 

14,8593

Stability:

Stable. Oxidizer. Incompatible with finely powdered metals, alcohols, strong acids, strong reducing agents.

InChIKey

XUXNAKZDHHEHPC-UHFFFAOYSA-M

CAS DataBase Reference

7789-38-0(CAS DataBase Reference)

EPA Substance Registry System

Sodium bromate (7789-38-0)

Safety

Hazard Codes 

O,Xn,Xi

Risk Statements 

8-22-36/37/38-9-36/37

Safety Statements 

17-26-36-37/39

RIDADR 

UN 1494 5.1/PG 2

WGK Germany 

3

RTECS 

VZ3150000

F 

3

Hazard Note 

Oxidising Agent/Harmful

TSCA 

Yes

HS Code 

2829 90 40

HazardClass 

5.1

PackingGroup 

II

Hazardous Substances Data

7789-38-0(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: 400 mg/kg

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H271May cause fire or explosion; strong oxidiser

H301Toxic if swalloed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P220Keep/Store away from clothing/…/combustible materials.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Sodium bromate Chemical Properties,Usage,Production

Chemical Properties

Sodium bromate is a colorless or white crystalline solid. Odorless.

Chemical Properties

White crystals or powder; odorless. Soluble in water; insoluble in alcohol.

Uses

As a mixture with sodium bromide for dissolving gold from its ores.

Uses

The bromates of chief industrial interest are those of sodium and potassium. Sodium bromate is used in mixtures with sodium bromide to extract gold from ore. It is also used as an analytical reagent, as a cleaning agent for boilers, and as a component in hair-waving formulations. Potassium bromate is used primarily as a conditioner for flour and dough; some of its nonfood uses include use as an oxidizing agent for analytic chemistry and as a brominating agent. The bromates of calcium and barium have limited use as oxidizers, maturing agents in flour, and analytic reagents.

Uses

Sodium bromate is used as an oxidant to convert tetrahydropyranyl ethers to carbonyl compounds. It acts as an analytical reagent. It is also used for dissolving gold from its ores, boiler cleaning, oxidation of sulfur and vat dyes. Further, it is used in hair treatment formulations as a hair-permanent.

Definition

ChEBI: An inorganic sodium salt having bromate as the counterion.

General Description

A white crystalline solid. May explode under prolonged exposure to heat or fire. Used in chemical analysis.

Air & Water Reactions

Water soluble.

Reactivity Profile

Sodium bromate is an oxidizing agent. May react violently with combustibles and reducing agents. Reacts with textiles, oil, fat, grease, sugar, sawdust and ammonium salts, carbon, phosphorus, metal powders and sulfides with hazard of fire and explosion [Handling Chemicals Safely 1980 p. 831]. A mixture of finely divided aluminum with finely divided Sodium bromate explodes by heat, percussion, and friction [Mellor 2:310 1946-47].

Hazard

Oxidizing material, dangerous fire risk near organic materials. Toxic by ingestion.

Health Hazard

Toxic by ingestion. Inhalation of dust is toxic. Fire may produce irritating, corrosive and/or toxic gases. Contact with substance may cause severe burns to skin and eyes. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

These substances will accelerate burning when involved in a fire. May explode from heat or contamination. Some may burn rapidly. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard.

Safety Profile

Poison by ingestion, intravenous, subcutaneous, and intraperitoneal routes. A powerful oxidizer. Violent reactions with Al, As, C, Cu, oil, F2, metal sulfides, organic matter, P, S. lxtures with grease are shock-sensitive explosives at 120’C. When heated to decomposition it emits toxic fumes of Na2O and Br-. See also BROMATES.

Potential Exposure

Used for research and development; as an analytical reagent; for separating gold from ores; making vat dyes; boiler cleaning.

Shipping

UN1494 Sodium bromate, Hazard Class: 5.1; Labels: 5.1-Oxidizer. UN1450 Bromates, inorganic, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, Technical Name Required.

Purification Methods

It is crystallised from hot water (1.1mL/g) to decrease contamination by NaBr, bromine and hypobromite. [Noszticzius et al. J Am Chem Soc 107 2314 1985.]

Incompatibilities

Dust may form explosive mixture with air. A strong oxidizer capable of increasing the intensity of an existing fire. Can react, possibly violently, with combustible, organic, or other oxidizable materials, alcohols, glycols, reducing agents, strong acids, finely divided metals, especially aluminum. Contamination with carbon, organic matter, and finely divided metal can cause sodium bromate become shock-sensitive. Decomposes at 381C. Sodium bromate may explode in heat of fire.

Waste Disposal

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material’s impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations. See also Sigma-Aldridge data sheet (Sodium Bromate .99%).