What are the storage stability concerns?

The aqueous solution is unstable, and the powder easily absorbs moisture and oxidizes in air.

Na2s2o4 / Rongalite China Sodium Hydrosulfite

Name: Na2s2o4 / Rongalite China Sodium Hydrosulfite
Brand: Zhengzhou Kelai Chemical Co., Ltd.
SKU: 763915712

Henan, ChinaZhengzhou Kelai Chemical Co., Ltd.

US$990.00-1,090.00

21 Tons

Product profile

Customization

Available

CAS No.

7775-14-6

Formula

Na2o4s2

Model NO.

85 88 90

EINECS

231-890-0

Certification

CCIC, CIQ, RoHS, ISO

Purity

85% 88% 90%

Type

Sodium Sulfate

Appearance

Crystal Powder

Grade Standard

Industrial Grade

Product Name

Sodium Hydrosulfite

Other Name

Sodium Hydrosulphite

Name

Shs

Shs Purity

85% 88% 90%

Shs Appearance

White Sandy Crystalline or Yellowish Powder

Application

Textile or Leather

Shs Grade

Industry Grade

Shs Formula

Na2s2o4

Loading Quantity

21mt/20'container

Iron (Fe)

20ppm Max

Zinc (Zn)

1ppm Max

Solution Appearance

Clear

Other Heavy Metal( as Pb)

1ppm Max

Water Insolubles

0.05% Max

Cadmium (CD)

None

Transport Package

Drum

Specification

50kg net

Trademark

Kelai

Origin

Henan

HS Code

2831101000

Production Capacity

60000 Ton/Tons Per Year

Key features

High Purity Options: Available in 85%, 88%, and 90% purity grades for industrial and food additive applications.

Strong Reducing Agent: Possesses strong reducing properties and is easily oxidized by air oxygen.

Textile Industry Application: Widely used for reducing dyeing, cleaning, printing, decolorizing, and bleaching silk, wool, and nylon.

Food Bleaching Use: Suitable for bleaching gelatin, sucrose, candied fruit, soaps, animal oils, and bamboo utensils.

Wood Pulp Bleaching: Identified as the most suitable bleach specifically for wood pulp processing.

Organic Synthesis Agent: Applied in organic synthesis as a reducing agent or bleach for dyes and pharmaceuticals.

Low Heavy Metal Content: Contains minimal heavy metals like Iron (20ppm max) and Zinc (1ppm max) ensuring bright results.

Standard Packaging: Packaged in 50kg net drums with a loading capacity of 21MT per 20-foot container.

Company profile

Zhengzhou Kelai Chemical Co., Ltd.

Henan, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2015-01-21Average Response Time: ≤2.35hTerms 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.