Character	White or yellow crystalline powder or small crystalline, with a strong smell of sulfur dioxide, it is soluble in water.
Applications	In food industry, it is used as bleaching agents, preservatives, loosen agents, antioxidants, color protecting agents and preservatives.
	Medicine industry-- be used for the production of chloroform, phenylpropane and benzaldehyde.
	Rubber industry-- be used as a coagulant.
	Printing and dyeing industry-- be used as a dechlorination agent for cotton bleaching and a cotton cooking agent.
	Tannery industry for leather treatment, to make leather soft, plump, tough, with waterproof, anti - folding, wear resistance and other properties.
Package	ChoiceChem has several kinds of package can be choosen, OEM accepted.

Product Parameters

Item	Industrial Grade	Food Grade	High Purity Grade	Meidical Grade
Main content(Na2S2O5)%	≥96.5	≥97.5	≥98	≥99
Fe(As content Fe)%	≤0.005	≤0.0015	≤0.001	≤0.0005
Clarity	Clear	Clear	Clear	Clear
Water-Insoluble%	≤0.05	≤0.02	≤0.01	≤0.005
Heavy metal content (Pb)%	≤0.0002	≤0.0002	≤0.0005	≤0.0005
Arsenic content (As)%	≤0.0001	≤0.0001	≤0.0001	≤0.0005
NaCl content	-	-	-	≤0.010
PH	4.2-4.8

Welcome to ChoiceChem

Choice Chemicals Ltd. is a specialty chemicals company in the business of producing and marketing Sulfates, Nitrates, Additives and Pesticide with more than 20 years OEM production experience in China. We help improve quality of life for the world's population by supplying superior quality & environment friendly chemicals to satisfy the global demand for agriculture and industry. ChoiceChem's mission is to be the supplier of choice to its customers, to produce meaningful benefits for consumers, our market partner and our employees, create brighter lives for people today and generations to come.

We mainly supply "ChoiceChem" brand Sodium metabisulphite, with an annual production capacity of 250,000 tons; as well as sodium bisulfite, sodium sulphite, sodium bicarbonate and magnesium sulphate, with production capacities of 40,000 tons each per year. In addition, the range of products is always expending according to customers' needs. 

ChoiceChem's large-scale production bring cost advantage, our price is lower 2% compared with market price usually, it also can make sure most common package cargo can be delivered within 14 days. All ChoiceChem products were ISO/SGS approved, with 0 quality complain in past 3 years; and each sales has worked in ChoiceChem for more than 5 years on average in our multilingual customer service team.

In today's market, it's critical to have a reliable source of fairly priced, high-quality product. It's also important to have a partner who is there when you need for your growing business. With ChoiceChem, you can have both. 

Q.How do you control your quality?
A:
(1). ChoiceChem only use high purity raw material
A. Using 99.8% pure imported S. The high purity S allows the generation of very high purity SO2 which is further used to making high purity sodium sulphite than usually obtained. 
ChoiceChem sodium sulphite's purity is commonly measured above 98%, which is substantially higher than Chinese national standard of 96%.

B.Using 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 pulp industrial requirements.

(2). Strict Factory Inspection System
All products are tested every 2 hours, and substandard products are 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. 

(3). Strict package and loading system
ChoiceChem only use high quality package and packing the cargo after cooling totally, to avoid expansion caused by SO2. The cargo be loaded in our factory directly, whole loading process be inspected by supervisor.

Q.What is your delivery time?
A:
(1).Our delivery time is updating according to order situation everyday.
(2).Current output is 680MT/day, allowing most cargo orders to be delivered within 7-10 days usually.
If it is China Entry-Exit Inspection and Quarantine (CIQ) inspection cargo, extra one week will be required for applying and accepting CIQ inspection.

If need OEM package, for colorful package, to engrave (for printing) need around 5-7 days, printing bags need around 1-3 days, domestic transportation need around 3-5 days, so extra 2 weeks will be needed;
for black color marks package,  to engrave (for printing) need around 1-2 days, printing bags need around 1-3 days, domestic transportation need around 3-5 days, so extra 7-10 days will be needed;

Would you please inform us your purchase quantity and your expectation for receiving the cargo?
Please contact our sales representative and will check it for you immediately.

Q.How you make sure delivery is on time?
A:
(1) Our output is 680MT/day, allowing most cargo orders to be delivered within 7-10 days usually.
(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.

Q.Can you do OEM package? 
A: Yes, we can do OEM package per your request.
ChoiceChem also offer free package designing service after you decide to working with us, our professional marketing team will help you to build your own brand in your market.

Q.What's MOQ for OEM package?
A: The MOQ is 5000pcs.

Q.Do you have stock?
A:
1.We sell good and always got orders in line before production, so we don't have stock, all produce are according to the customer's orders. 
2.Our goods storage time is less than 3 days, to maintain the freshness of the goods.
3.Our output is 680MT/day, allowing most cargo orders to be delivered within 7-10 days.
May I know when you need the cargo?

Q.I need do registration before importing, can you support registration?
A: Could you please tell us your full registration documents requirements? I will check with our registration department for you and try our best to help finish registration soon.

Q.Are you factory?
A: