Sodium Hydrosulfite (Sodium Dithionite);
Na2O4S2, CAS 7775-14-6;
White crystalline powder;
Moisture sensitive;
Competitive price and good quality.

Chemical Identification

Common Name:	Sodium Hydrosulfite
Synonyms:	Burmol; Dithionous acid disodium salt; Sodium dithionite; Sodium hydrosulfite; Sodium hydrosulphite; Sodium hypodisulfite; Sodium sulfoxylate; Vatrolite.
CAS No.:	7775-14-6
EINECS No.:	231-890-0
Appearance:	White crystalline powder
Density:	2.13
Melting Point:	300ºC
Stability:	Stable, but moisture sensitive.  Incompatible with strong acids, strong oxidizing agents, water, moisture.
Molecular Formula:	Na2O4S2
Molecular Weight:	174.1
Molecular Structure:

Product Information

Specifications:

Product name: Sodium Hydrosulphite Manufacturer: Ningbo Titan Unichem Co., Ltd.
Items	Specifications
Appearance	White crystalline powder
Na2S2O4	88% min
Fe	20ppm max
Zn	1ppm max
Na2CO3	1.0-5.0%
Other heavy metal (as Pb)	1ppm max
Water Insolubles	0.05% max
Shelf Life	12 month

Pictures:

 

Package of Sodium Hydrosulfite from TITAN UNICHEM.

 

Loading of Sodium Hydrosulfite from TITAN UNICHEM.

 

Loading of Sodium Hydrosulfite from TITAN UNICHEM.

 

Loading of Sodium Hydrosulfite from TITAN UNICHEM.

 

Loading of Sodium Hydrosulfite from TITAN UNICHEM.

Packaging:

• Packed in 50kgs iron drums;

• Package as per customer's request.

Delivery:

• Prompt shipment within 2 weeks.

Storage & Handling:

• Keep in closed or covered containers when not in use.

• Store in cool dry place with adequate ventilation.

• Store in tightly closed containers.

• Do not store near oxidants, acids or combustible materials.

Safety Information:

Hazard Class:	4.2
RIDADR:	UN 1384
Packing Group:	II
HS Code:	2831101000
Safety Statements:	S26-S28-S43-S7/8
Risk Statements:	R22;R31;R7
Hazard Codes:	Xn: Harmful

Application

Descriptions:

• Sodium dithionite is a whitish to light yellow crystalline solid having a sulfur dioxide-like odor.

• Sodium dithionite spontaneously heats on contact with air and moisture.

• This heat may be sufficient to ignite surrounding combustible materials.

• Sodium dithionite is soluble in water.

Uses:

• It's widely used in textile industry for vat dyeing, reduction cleaning, printing and stripping, textile textile bleaching.

• It's also used in bleaching paper pulps, especially mechanical pulps, it's the most fittable bleaching agent in pulps.

• It's used in bleaching kaolin clay, fur bleaching and reductive whitening, bleaching of bamboo products and straw products.

• It's used as reducing agent in chemical industry.

• The food additive grade of Sodium Hydrosulfite is used as bleaching agent and preservative dried fruits, dried vegetable, vermicelli, rock sugar, caramel, candy, liquid glucose, bamboo shoots, mushrooms and canned mushrooms.