Manufacture Sodium Sulphite Anhydrous Sodium Sulfite Anhydrous Sulfur Trioxide CAS 7757-83-7

• CAS No.: 7757-83-7
• Formula: Na2so3
• EINECS: 231-821-4
• Certification: ISO
• Purity: 90%~99%
• Type: Sodium Sulfite
• Model NO.: Sodium Sulfite Anhydrous
• Appearance: Powder
• Grade Standard: High Purity Grade
• Character: White Crystalline Powder
• National Standard: GB1886.8-2015
• Na2so3: 97%Min.
• Quality Assurance: ISO-9001
• Raw Materials: Sulphur and Soda Ash
• Transport Package: PP Jumbo Bag
• Specification: 25/ 50/ 1000 kg/bag
• Trademark: ChoiceChem
• Origin: Cn
• HS Code: 28321000
• Production Capacity: 300mt/Day

Product Description

Product Description

Sodium Sulfite 98%, sodium sulphite  is a soluble sodium salt of sulfurous acid (sulphite) with the chemical formula Na₂SO₃.It is a white crystal powder or granule that tastes salty with sulphur odor.

CAS RN.:	7757-83-7
EINECS:	231-821-4
H.S.CODE:	2832.1000.00

 

1. Chemical Analysis

Sodium Sulphite 98% Crystalline

Component	Range	Typical
Na2SO3 %	≥ 98.0 %	98.37%
Fe %	≤ 0.003%	0.003%
Water insoluble matter	≤ 0.02%	0.02%
Na2CO3	≤ 0.60%	0.23%
As	2ppm max.	-
Pb	10ppm max.	<10 ppm

 

Sodium Sulphite 97% Powder / Crystaline

Component	Range	Typical
Na2SO3 %	≥ 97.0 %	97.5%
Fe %	≤ 0.003%	0.003%
Water insoluble matter	≤ 0.02%	0.02%
Na2CO3	≤ 0.60%	0.23%

 

Sodium Sulphite 96% Powder / Crystalline 

Component	Range	Typical
Na2SO3 %	≥ 96.0 %	96.5%
Fe %	≤ 0.003%	0.003%
Water insoluble matter	≤ 0.02%	0.02%
Na2CO3	≤ 0.60%	0.23%

 

2. Application 

Pulp and paper industry	Lignin removal agent
Water treatment	Oxygen scavenger agent.
Photographic industry	To protect developer solutions from oxidation and (as hypo clear solution) to wash fixer (sodium thiosulfate) from film and photo-paper emulsions.
Textile industry	Bleaching, desulfurizing and dechlorinating agent
Chemical manufacturing	Sulfonation and sulfomethylation agent. It is used in the production of sodium thiosulfate.
Leather trade	The sulfitization of tanning extracts
Other applications	l   froth flotation of ores l   oil recovery l   food preservatives l   making dyes l   It is used in the purification of TNT for military use.

 

3. Transportation Information:

DOT Classification:	Not a DOT controlled material
U.N.	Not applicable
Packing Group:	Not applicable

 

4. Handing & Storage

(1).Precautions:Do not ingest. Do not breathe dust. Wear suitable protective clothing. If ingested, seek medical advice immediately and show the container or the label. Keep away from incompatibles such as oxidizing agents, combustible materials, organic materials, acids.

 

(2).Storage: Air sensitive. Moisture sensitive. Keep container tightly closed. Keep container in a cool, well-ventilated area.

 

Packaging & Shipping

l  In 25kg bags
l  27MT/20'FCL.
l ChoiceChem brand package
l OEM package can be chosen

Company Profile

Who We Are
ChoiceChem is a specialty chemicals company that is in the business of producing and marketing sulphates, nitrates, additives, and pesticides. With 20 years of OEM production experience in China, we help to improve the quality of life for the world's population by supplying superior quality and environmentally friendly chemicals to satisfy global demand in agriculture and industry.
We operate worldwide and have offices in Australia and the United Kingdom offering full services and logistics. Our global reach and the range of our products are continuously developing in line with our customers' needs.
Our mission is to be the supplier of choice for our customers and to deliver meaningful benefits for our consumers, market partners, employees, and the world around us in a sustainable manner and to create brighter lives for people today and for generations to come. 

FAQ

Q: How we control Sodium Sulphite quality?
A:
(1)Choosing high purity raw material
The raw materials for Sodium Sulphite (SS) are Sulphur and Soda Ash.

ChoiceChem uses 99.8% pure imported Sulphur:

Using high purity Sulphur allows the generation of very high purity SO₂ which is further used to making high purity SS than usually obtained. ChoiceChem SS's purity is commonly measured above 97%, which is substantially higher than the national standard of 96%.

 

In addition, using high purity Sulphur allows us to make very white SS. We however have special technology which can control the whiteness to suit different market preferences.

 

ChoiceChem uses high purity soda ash:

The soda ash which ChoiceChem use has an alkali content of more than 99.2%, and NaCl content of less than 0.97%. Our high purity soda ash help us produce higher purity Sodium Sulphite, and can avoid impurities (like Cl and Iron), which allows our products to better meet printing, dyeing and food industrial requirements.

(2) Strict Factory Inspection System
A.The sampling and testing methodologies we use are strictly in accordance to Chinese Domestic Standard: GB 1886.8-2015 (please contact us if you need details of GB 1886.8-2015).
B. All products are tested every 2 hours, and substandard products are not allowed to leave the factory. We also have third-party tests carried out every 3 days, to ensure our in-house tests are properly calibrated and accurate.

Q: How we make sure delivery is on time?
A:
(1) Our output is 300MT/day, allowing most cargo orders to be delivered within 7 days.
(2) ChoiceChem average rate of on time deliveries has remained above 98.9% in the past 3 years.
(3) We further promise that if delivery is not made in time, we will provide compensation at the rate of 0.25% of the contract amount per week.