What certifications does the product have?

The product is certified with ISO 9001:2015, EU REACH, and UK REACH.

What is the delivery time?

The standard delivery time is 15 days.

99% Purity 25kg Bag for Textile Dyeing Sodium Thiosulphate

Name: 99% Purity 25kg Bag for Textile Dyeing Sodium Thiosulphate
Brand: Changsha Weichuang Chemical Co., Ltd.
SKU: 2243720485

Hunan, ChinaChangsha Weichuang Chemical Co., Ltd.

US$160.00-230.00

20 Tons

Product profile

Customization

Available

CAS No.

10102-17-7

Formula

Na2s2o3 . 5H2O

Model NO.

99% min

EINECS

231-867-5

Appearance

Colorless Transparent Crystal

Classification

Inorganic Salt

Certification

ISO, Reach

Purity

≥99%

Type

Sodium Thiosulfate

Grade Standard

industrial Grade / Photo Grade

Other Names

Sodium Thiosulphate, Hypo

Application

Water Treatment, Leather Tanning, Aquaculture etc

Water Solubility

Easily Soluble in Water

Shelf Life

One Year

Size

1-3mm, 2-4mm, 4-7mm

Molecular Weight

248.18 G/Mol

Density

1.667 G/Cm³

Melting Point

48 ℃

Boiling Point

100 ℃

Storage Condition

in a Cool and Dry Place

Transport Package

25kg Neutral Woven Bags/Jumbo Bags

Specification

99% min

Trademark

Weichuang

Origin

China

HS Code

28323000

Production Capacity

3000tons/Month

Key features

High Purity Options: Available in Industrial Grade (98.5% min) and Photo Grade (99% min) for diverse applications.

Flexible Size Selection: Crystal sizes include 1-3mm, 2-4mm, and 4-7mm to suit different processing needs.

Wide Application Scope: Used in water treatment, leather tanning, aquaculture, dyeing, and as a dechlorinating agent.

Certified Quality: Complies with ISO 9001:2015, EU REACH, and UK REACH standards for global safety.

Custom Packaging: Standard 25kg bags or 1000kg/1250kg jumbo bags; other packings customizable upon request.

Fast Delivery: Standard delivery time is 15 days, ensuring timely supply for your projects.

Free Sample Availability: Free samples provided; customers only need to cover the freight charges.

Reliable Manufacturer: Professional exporter with 3000mt/month capacity and mature production craft since 2000.

Company profile

Changsha Weichuang Chemical Co., Ltd.

Hunan, China

Business Type: Manufacturer/Factory, Trading CompanyAverage Response Time: >24h

AI-Powered supplier vetting

SummaryChangsha Weichuang Chemical Co., Ltd. is a China-based limited trading company established in 2007 with nine employees. It offers several chemical products and holds an ISO9001:2015 certificate. Service procedures for corrective actions, customer complaints, supplier approval, and service assessment are documented and followed, while overseas service coverage is absent. The supplier reports ODM, OEM, and sample/design customization capabilities, but no new products were developed in the past year and no SDK is available. Export sales represent 71%–90% of total sales, with self-managed import/export rights, although exporting began only one year ago. Lead times are stated as within 15 working days in both peak and off-season periods. Financial records are identified for 2022–2024, but no financial results are provided. Production capacity, raw-material traceability, and customer-specific cases are not sufficiently documented.

CertificationsThe supplier holds an ISO9001:2015 certificate. A BV audit report is listed with validity from September 30, 2025 to September 29, 2026, but the audit result is recorded as “0” without an explanation of its meaning.

After-Sales capabilityDocumented and followed procedures exist for corrective and preventive actions, customer complaints, supplier approval, and service-capability assessment. However, the supplier has no overseas showroom, overseas agent or branch, or offline trade-show participation, and reports service coverage in zero countries.

R&D capabilityThe supplier reports one year of total R&D-engineer experience, no new product development in the past year, and no available SDK. It does offer ODM services, indicating some design-development support, but the evidence does not demonstrate strong ongoing innovation.

Customization capabilityThe supplier explicitly offers ODM services, OEM services for popular brands, and customization from samples and designs. These statements provide direct evidence of customization capability, although no project scale or technical details are supplied.