Sodium Metabisulfite By Tianjin Xinbei Chemical Co., Ltd.,

Sodium Metabisulfite

Pays:

China

N Â° de modÃ¨le:

95%/97%

Prix FOB:

(Negotiable) Obtenir le dernier prix

LocalitÃ©:

Tianjin

Prix de commande minimale:

Commande minimale:

20tons

Packaging Detail:

Heure de livraison:

at once

Capacité de Fournir:

3000tons

Payment Type:

Groupe de produits :

Acid &related products

La description

We are a leading supplier & exporter of Sodium Metabisulfite from China. We supply high quality products on wholesale price. We also ensure purity of the chemicals we sell. Wanna buy, feel free to contact us.

SODIUM METABISULFITE

PRODUCT IDENTIFICATION

CAS NO.
********4

EINECS NO.
********0

FORMULA
Na2S2O5

MOL WT.
**0.*0

H.S. CODE


TOXICITY


SYNONYMS
Dinatriumdisulfit; Disulfito de disodio; Disulfite de disodium; Disodium disulfite; Disodium Salt Pyrosulfurous Acid; Disulfurous acid, disodium salt; Pyrosulfurous acid, disodium salt; Sodium Metabisulfite; Sodium disulfite; Sodium Pyrosulfite

DERIVATION


CLASSIFICATION


PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE
white crystalline powder with odor of sulfur dioxide

MELTING POINT
**0 C (Decomposes)

BOILING POINT


SPECIFIC GRAVITY
1.*8

SOLUBILITY IN WATER
Freely soluble (**0g/l)

pH
3.5 - 5

VAPOR DENSITY


AUTOIGNITION


NFPA RATINGS
Health: 1; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX


FLASH POINT


STABILITY
Stable under ordinary conditions. Hygroscopic.

GENERAL DESCRIPTION & APPLICATIONS

Sodium Metabisulfite is a white to slightly yellowish crystalline powder with sulfur dioxide odor; readily soluble in water. Sodium metabisulfite containing more than *5.0% SO2 w/w releases sulfur dioxide gas when mixed with water. It forms a bisulfite adduct with aldehyde and with ketones to a sulfonic acid. It is used to purify or isolate aldehydes and ketones. Sodium metabisulfite's reductive and sulfonating properties provide versatile applications. It is used as an oxygen scavenger to eliminate the dissolved oxygen in waste water and in pipes.

Sodium Metabisulfite is a reductive bleaching agent. It reduces carbonyl and alcohol groups, which function as colorants of the substances. It is used in bleaching mechanical paper pulp, cotton, wool and kaolin clay. Additional applications include as a preservative (antioxidant), a hair waving agent, and Ensiling agent. Bisulfites are used in industries concerned with leather processing, food and beverage processing, gas purification, water treatment to remove excess chlorine, textiles and pulp processing, and many others. It is used as a reducing agent in chemical manufacturing. It is an alternative to sulfur dioxide which is used in sterilization of equipment.

SALES SPECIFICATION

TECH GRADE

APPEARANCE
White to slightly yellowish crystalline powder

CONTENT
*8.0% min

SO2
*5.0% min

Na2S2O4
2.0% max

INSOLUBLES IN WATER
0.*5% max

PARTICLE SIZE
*5% (mesh **0)

pH
4 *4.6

Fe
5ppm max

FOOD GRADE

APPEARANCE
White to slightly yellowish crystalline powder

CONTENT
*8.0% min

SO2
*5.0% min

Na2S2O4
2.0% max

INSOLUBLES IN WATER
0.*5% max

PARTICLE SIZE
*5% (mesh **0)

HEAVY METALS
*0ppm max

As
1ppm max

Fe
5ppm max

pH
4.5 - 5.5

TRANSPORTATION

PACKING
*5kgs in bag

Pays:	China
N Â° de modÃ¨le:	95%/97%
Prix FOB:	(Negotiable) Obtenir le dernier prix
LocalitÃ©:	Tianjin
Prix de commande minimale:	-
Commande minimale:	20tons
Packaging Detail:	-
Heure de livraison:	at once
Capacité de Fournir:	3000tons
Payment Type:	-
Groupe de produits :	Acid &related products