What is the chemical formula and CAS number?

The chemical formula is Na2S2O3, and the CAS number is 7772-98-7.

Is the product soluble in water?

Yes, the product is easily soluble in water and alcohol, but insoluble in air heating oxidation.

Leather Industry Additive Hypo Sodium Thiosulfate

Name: Leather Industry Additive Hypo Sodium Thiosulfate
Brand: Zhengzhou Kelai Chemical Co., Ltd.
SKU: 2004686882

Henan, ChinaZhengzhou Kelai Chemical Co., Ltd.

US$350.00-650.00

5 Tons

Sample price:US$0.00/kg.Request sample

Product profile

Customization

Available

CAS No.

7772-98-7

Formula

Na2s2o3

Model NO.

Sodium Thiosulfate

EINECS

231-867-5

Certification

CCIC, CIQ, RoHS, ISO

Purity

≥99%

Type

Sodium Sulfate

Appearance

Powder

Grade Standard

Industrial Grade

Product Name

Sodium Thiosulfate

Other Name

Sodium Thiosulfate Pentahydrate

Sodium Thiosulfate Formula

Na2s2o3

Formula Weight

158.108

Boiling Point

100 ℃

Water-Solubility

Easy to Dissolve

Density

1.667 G/Cm³

Type(Grade)

Industry Grade

Sodium Thiosulfate Appearance

Colorless Transparent Crystals

Melting Point

48 ℃

Solubility

Soluble in Water

Fe

0.002% Max

pH Value

7.5

Sodium Thiosulfate Purity

99% Min

Storage

Dry Place

Transport Package

25kg Bag, or 1000kg Jumbo Bag

Specification

25kg bag, or 1000kg jumbo bag

Trademark

Kelai

Origin

China

HS Code

2830909000

Production Capacity

100000mt Per Year

Key features

High Purity Grade: Purity up to 99% with strict quality control for industrial and photographic applications.

Versatile Applications: Used in photography fixing, tanning, dyeing, pulp bleaching, and silver extraction.

Customizable Packaging: Available in 25kg net bags or fully customized packaging to meet specific needs.

Multiple Certifications: Certified by CCIC, CIQ, RoHS, and ISO for global market compliance.

Global Shipping Options: Flexible Incoterms including FOB, CFR, CIF, DDP, and DAP for worldwide delivery.

Diverse Payment Methods: Supports LC, T/T, D/P, PayPal, Western Union, and small-amount payments.

Bulk Loading Capacity: Efficient loading of 25MT per 20-foot container for large-scale orders.

Company profile

Zhengzhou Kelai Chemical Co., Ltd.

Henan, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2015-01-21Average Response Time: ≤2.55hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF, DDP, DAP

AI-Powered supplier vetting

SummaryZhengzhou Kelai Chemical Co., Ltd. is identified as a trading company headquartered in Zhengzhou, Henan, with permitted import and export activities. The provided information describes fine-chemical R&D, production, operations, and exports to more than 68 countries, although other records characterize the entity as a chemical-products trading business. It reports ISO 9001 and ISO 14001 certifications, OEM/ODM availability, recent new-product activity, and multiple customization options. Service logistics include warehousing, contract-carrier transportation, and stated lead times within 15 working days in both peak and off-season periods. However, it has no overseas showroom, agents, branches, or offline trade-show participation, and no SDK is available. Financial records are indicated for 2023–2025, but no substantive financial-performance evidence is provided. Supplier-management procedures are not documented, and customer evidence is limited to general claims of OEM service for known brands and exports...

Supplier typeThe supplier is explicitly classified as a trading company, with permitted import/export activities and a Zhengzhou, Henan location. Its background description also states involvement in fine-chemical R&D, production, and operations, so the available records present both trading and product-related capabilities.

CertificationsThe supplier reports holding ISO 14001 and ISO 9001 certifications. These are explicit certifications relevant to environmental and quality management systems.

After-Sales capabilityService support includes warehousing, contract-carrier transportation, and stated lead times within 15 working days in both peak and off-season periods. However, the supplier reports no overseas showroom, agents, branches, or offline trade-show participation, and offers overseas services in zero countries; therefore, after-sales coverage is not demonstrated as strong, particularly internationally.

R&D capabilityThe supplier reports R&D capability, at least one new product during the past year, and ODM services; its company background describes fine-chemical R&D. However, it explicitly has no available SDK, so innovation support is evidenced for product development but not for SDK-based integration.

Customization capabilityThe supplier explicitly offers customization from samples, full customization, minor customization, flexible customization, and customization from designs. It also reports ODM availability, providing direct evidence of broad customization support.

Product Q&A

Q:What are the main applications of this product?

It is mainly used as a fixing agent in photography, a reducing agent in tanning, a mordant, a bleach for wheat straw and wool, and for dechlorination in pulp bleaching.

Q:Can the packaging be customized?

Yes, we offer standard 25kg net bags or fully customized packaging options to suit your specific requirements.

Q:What certifications does the product hold?

The product is certified by CCIC, CIQ, RoHS, and ISO, ensuring compliance with international quality and safety standards.

Q:What payment terms do you accept?

We accept various payment methods including LC, T/T, D/P, PayPal, Western Union, and small-amount payments via Money Gram.

Q:How is the product shipped?

We offer flexible shipping terms such as FOB, CFR, CIF, DDP, and DAP, with a loading capacity of 25MT per 20-foot container.