Two white plastic bottles with blue screw caps labeled Sodium Thiosulphate Pentahydrate 99% Extra Pure
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Sodium Thiosulphate Pentahydrate 99% Extra Pure

Sodium Thiosulphate Pentahydrate 99% Extra Pure is a crystalline chemical used in photographic fixing, water treatment, and analytical chemistry. Available with prompt supply in Kenya.

Technical Specifications

CAS Number7772-98-7
Chemical FormulaNa2S2O3·5H2O
AppearanceColorless to white crystalline solid
Packaging1 kg, 5 kg, 25 kg polypropylene bags or bulk supply
StorageStore in cool, dry, ventilated chemical storage away from incompatible materials

Sodium Thiosulphate Pentahydrate 99% Extra Pure — Specifications, Uses & Availability

Product Overview

Product NameSodium Thiosulphate Pentahydrate 99% Extra Pure
CategoryWater treatment
AvailabilityIn Stock — Ready for Dispatch

Explore Water treatment, browse the full chemical catalogue, or request a quote.

About Sodium Thiosulphate Pentahydrate 99% Extra Pure

Sodium Thiosulphate Pentahydrate 99% Extra Pure is a crystalline salt widely utilized in industrial processes requiring high purity and reliability. Commonly applied in photographic processing, it acts as a fixer to dissolve unexposed silver halide crystals, stabilizing the image. Beyond photography, this compound serves as a reducing agent in analytical chemistry for iodometric titrations and neutralizing chlorine in water treatment operations. Stored properly in cool, dry conditions, Sodium Thiosulphate Pentahydrate ensures consistent reactivity and extended shelf life even in humid environments typical of East Africa. For industrial buyers in Kenya and surrounding regions, Finstar Chemicals provides this chemical in secure packaging to preserve quality during transit and storage. Procurement teams benefit from our batch traceability and certificates that confirm compliance with pharmaceutical and reagent standards. Safe handling guidelines help mitigate risks associated with dust inhalation or accidental ingestion. This product efficiently supports water purification processes by neutralizing residual chlorine, protecting aquatic life and improving potability. In chemical manufacturing, it is used in bleaching and as a stabilizer for various compounds. Its ability to form complex ions aids in heavy metal detoxification applications. Finstar Chemicals delivers Sodium Thiosulphate Pentahydrate in scalable volumes suitable for laboratory, municipal, or industrial uses across the region.

External references: PubChem · Wikipedia

Applications

Photographic FixingUsed to dissolve unexposed silver halides after photo development, stabilizing images in photographic processing.
Water Treatment DechlorinationNeutralizes residual chlorine in treated water, preventing corrosive effects and improving safety in potable water supplies.
Analytical Chemistry TitrationsActs as a reducing agent in iodometric titrations for quantifying oxidizing agents with precision.
Bleaching AgentFacilitates removal of undesired color in textiles and paper manufacturing through redox reaction mechanisms.
Heavy Metal DetoxificationForms soluble complexes with heavy metals aiding removal in wastewater treatment applications.

Benefits

Minimizes Photographic FoggingHigh purity reduces contamination in photographic baths, resulting in sharper image quality and longer bath life.
Chlorine Neutralization EfficiencyReacts stoichiometrically with chlorine, preventing overdosing and downstream equipment corrosion in water plants.
Consistent Reaction PerformanceBatch certification ensures predictable reagent strength critical for standardized analytical testing procedures.
Long Shelf StabilityProper crystalline pentahydrate form retains moisture content, preventing degradation during storage in humid climates.
Heavy Metal ComplexationIts thiosulphate ion forms stable complexes with metals like mercury and silver, aiding environmental cleanup processes.

Features

Extra Pure GradeMeets BP and USP specifications ensuring suitability for pharmaceutical, analytical, and industrial uses.
Varied Packaging OptionsAvailable in bags ranging from 1 kg to 25 kg, supporting small labs to large industrial users.
Batch TraceabilityEach batch includes full certificate of analysis to comply with regulatory and quality assurance demands.
No GHS Hazard LabelsClassified as low hazard with no mandatory GHS pictograms, simplifying transport and handling protocols.

Industries Served

Photography IndustryUsed in chemical film development and image fixing processes to produce stable photographs.
Water Treatment PlantsEssential for controlling chlorine residuals to meet water quality standards and protect infrastructure.
Chemical ManufacturingServes as a reagent or intermediate in producing other chemicals or for redox reactions in formulations.
Analytical LabsSupports quality control and research through precise volumetric analysis and reagent standardization.
Textile and Paper ProcessingApplied as a reducing agent and stabilizer in bleaching to improve product appearance and quality.

Sodium Thiosulphate Pentahydrate 99% Extra Pure is supplied by Finstar to industrial buyers across Kenya, Uganda, Tanzania, and Rwanda. Read our chemical safety guides for handling best practices.

Delivery Coverage Across Kenya’s Counties

Finstar is a leading supplier of industrial chemicals across Kenya’s counties. Sodium Thiosulphate Pentahydrate 99% Extra Pure is dispatched from our Nairobi Industrial Area warehouse to businesses nationwide — including Nairobi, Mombasa, Kisumu, and Nakuru counties — plus cross-border delivery to Uganda, Tanzania, and Rwanda. Towns we regularly supply include:

NairobiMombasaKisumuNakuruEldoretThikaRuiruKiambuMachakosNaivashaNyeriMeruKerichoKakamegaKitaleMalindiNanyukiAthi RiverVoiKilifi

Delivering to a different town or county? Request a quote and our logistics team will confirm delivery timelines to your location.

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