Sodium thiosulfate pentahydrate
ChemSP — A brand of Jinan Shenghe Chemical Co., Ltd.
High-quality Sodium thiosulfate pentahydrate supplied by ChemSP Competitive pricing, reliable delivery, and full technical support for B2B buyers worldwide.
Specifications
| Molecular Formula | Na2O3S2.5H2O |
|---|---|
| Molecular Weight | 248.17414 |
| Melting Point | 48.5℃ |
| Water Solubility | 680 g/L (20℃) |
Detailed Chemical Properties & Synonyms
Physical & Chemical Properties
性状 无色单斜晶系结晶。无臭，有清凉带苦的味道。 熔点 40~45℃ 相对密度 1.729（17℃） 溶解性 易溶于水，水溶液近中性。溶于松节油及氨。不溶于醇。
Applications / Uses
用于照相、电影、纺织、化纤、造纸、制革、农药工业
ChemSP - your B2B chemical sourcing brand. We provide consolidated logistics and multilingual technical support to ensure every shipment is stable and reliable.
Product Overview
Sodium thiosulfate pentahydrate is offered by ChemSP (Jinan Shenghe Chemical Co., Ltd.) as a catalogued inorganic chemicals raw material for B2B buyers.
Written as H10Na2O8S2, the molecule contains 10 hydrogen atoms, 2 sodium atoms, 8 oxygen atoms and 2 sulfur atoms in a single defined ratio — the basis for assay calculation and for reconciling batch weights against a specification.
At 248.19 it is a small molecule in the usual fine-chemical range, handled much like other solid or liquid intermediates of similar size.
Chemical Identity
| CAS Number | 10102-17-7 |
|---|---|
| Molecular Formula | H10Na2O8S2 |
| Molecular Weight | 248.19 |
| Melting Point | 48 °C |
| Catalog Category | Inorganic Chemicals |
Composition and Key Properties
The formula points to an oxygenated aliphatic or aromatic skeleton (alcohol, ether, ester or acid functionality), sulfur-containing functionality together with a mineral (metal-bearing) salt form — worth confirming against structural data before an analytical method is validated.
Applications and Use Cases
Sodium thiosulfate pentahydrate (CAS 10102-17-7; formula H10Na2O8S2; 248.19 g/mol) is mainly applied in chemical synthesis, fine chemical manufacturing and related industrial processes. For specification, COA and bulk prices of Sodium thiosulfate pentahydrate, write to our sales team.
- Use as a mineral source or counter-ion where the hydrated form drives the effective dose.
- pH adjustment, precipitation or catalyst-support work in aqueous systems.
- Blending into formulations where the anion, not just the assay, sets performance.
Specific end-uses should be checked against your own regulatory assessment before the material is qualified in a finished product.
Packaging and Handling
Supplied in standard export packaging appropriate to the physical form of the material. The exact pack size, inner liner and net weight are fixed on the order acknowledgement, since they depend on whether the lot ships as a solid, a paste or a liquid. Customers with drum, liner or pallet constraints should specify them when enquiring.
Quality and Documentation
Every lot is released against a written specification and ships with its own COA; the SDS follows the current GHS revision. Where a customer needs an additional test — heavy metals, residual solvent, particle size — it can normally be added to the specification for future lots.
Supply and Quotation
Quotations are issued against the product name and CAS number, with quantity, destination port or address, and any specification adjustments stated in the enquiry. Normal reply time is one business day.
Frequently Asked Questions
What is the CAS number of Sodium thiosulfate pentahydrate?
The CAS registry number for Sodium thiosulfate pentahydrate is 10102-17-7. Please quote it on any enquiry so that a quotation is matched to the correct grade.
Can you supply Sodium thiosulfate pentahydrate with a specification we define?
Yes. The acceptance criteria can be adjusted within what the route allows — most often assay, moisture, heavy metals or particle size. Any change is written into the specification before the lot is released.
Which documents come with the shipment?
A batch-specific COA and a GHS-format safety data sheet. Additional declarations — non-GMO, allergen, origin, or a customer-specific template — can be issued on request.
Request a Quotation
Extended Specifications
Sodium thiosulfate pentahydrate is supplied against a clear, batch-specific specification. When you request a quote, our team confirms the assay or purity grade, physical form, pack size and any residue limits relevant to your application. Typical parameters documented on the Certificate of Analysis include identity (CAS number), molecular formula, molecular weight, appearance, assay, loss on drying and heavy-metal limits where applicable.
Applications by Industry
Buyers source Sodium thiosulfate pentahydrate across food and beverage, nutraceutical and pharmaceutical, cosmetic and personal care, and selected industrial formulations. ChemSP aligns the grade and documentation set to the target application and destination market.
Regulatory & Compliance Support
ChemSP ships Sodium thiosulfate pentahydrate with a Certificate of Analysis for every batch and a Safety Data Sheet on request. Additional documentation such as specification sheets, third-party test reports and regulatory support letters is available to qualified buyers to streamline import, registration and quality-assurance workflows.
Storage & Handling
Store Sodium thiosulfate pentahydrate in a cool, dry, well-ventilated area in its original, tightly closed container, protected from moisture and direct sunlight. Follow the precautions in the Safety Data Sheet and standard chemical-handling guidance. Shelf life and re-test intervals are stated on the Certificate of Analysis.
Frequently Asked Questions
What is the minimum order quantity (MOQ)?
MOQ depends on grade and pack size. Sampling quantities typically start from 1 kg, with commercial volumes from 25 kg. Share your required volume and we will quote accordingly.
Can I request a sample and a Certificate of Analysis?
Yes. Samples and batch-specific Certificates of Analysis are available on request, and third-party testing can be arranged for qualified buyers.
What documentation supports import and registration?
Every shipment includes a Certificate of Analysis. The Safety Data Sheet, specification sheets and regulatory support letters are provided on request to support customs clearance and product registration in your market.
What are the typical lead times and payment terms?
Lead times vary with grade and volume. ChemSP quotes a firm delivery window with each offer, and standard international trading terms apply.
Molecular Profile
- Molecular formula
- H10Na2O8S2
- Molar mass
- 248.19 g/mol
- Heavy atoms (non-hydrogen)
- 12
- Total atoms
- 22
- Distinct elements
- 4
Elemental Composition
| Element | Atoms | Mass fraction |
|---|---|---|
| O | 8 | 51.57% |
| S | 2 | 25.84% |
| Na | 2 | 18.53% |
| H | 10 | 4.06% |
The table below is calculated from the molecular formula H10Na2O8S2. The values are theoretical and are intended as a reference for incoming inspection and for setting a purchase specification.
Contains the metallic element Na. The material behaves as an inorganic salt: it is non-volatile, generally water-soluble, and leaves an inorganic residue on ignition.
Contains sulfur. Sulfur-bearing materials may darken or develop odour under heat and should be kept away from oxidising agents.
At 248.17 g/mol the molar mass is in the small-molecule range, where volatility and dust generation are the practical handling concerns.
Identity and Registry Data
- CAS number
- 10102-17-7
Handling, Storage and Stability
Store sealed in a dry, well-ventilated area. Inorganic salts take up moisture readily and may cake or partially dissolve; keep away from strong acids.
Typical Specification Parameters
- Assay / content
- Loss on drying / moisture
- Appearance and odour
- Heavy metals (as Pb)
- Shelf life and packaging
- Residue on ignition (sulfated ash)
These are the parameters normally reported on a certificate of analysis. Limits are lot-specific and follow the specification agreed between supplier and buyer; no numeric limits are stated or implied here.
Frequently Asked Questions
What are the CAS number, molecular formula and molar mass of Sodium thiosulfate pentahydrate?
Sodium thiosulfate pentahydrate is identified by CAS 10102-17-7, molecular formula H10Na2O8S2 and a molar mass of 248.19 g/mol.
What is the elemental composition of Sodium thiosulfate pentahydrate?
Calculated from H10Na2O8S2, the composition by mass is: O 51.6%, S 25.8%, Na 18.5%, H 4.1%.
Which parameters are normally reported for Sodium thiosulfate pentahydrate?
A certificate of analysis normally reports Assay / content, Loss on drying / moisture, Appearance and odour, Heavy metals (as Pb), Shelf life and packaging, Residue on ignition (sulfated ash). Exact limits are agreed with the buyer and are lot-specific.
Applications
用于照相、电影、纺织、化纤、造纸、制革、农药工业
Packaging & Shipping
- Standard: 25 kg fiber drum / 200 kg steel drum with double PE liner
- Small pack: 1 kg / 5 kg aluminum foil bag for lab & sample
- Custom: packaging size and labeling per customer requirement
- Lead time: in-stock items ship within 3-5 business days
- Documents: COA, MSDS / SDS, TDS provided with every shipment
- Global: air, sea (FCL / LCL) and express to 80+ countries
Storage & Handling
Store in a cool, dry, well-ventilated place away from heat, direct sunlight and incompatible materials. Keep container tightly closed. Use appropriate personal protective equipment and refer to the SDS for full safety guidance before handling.
Frequently Asked Questions
Yes. A batch-specific COA and free or charged sample are available on request before bulk ordering.
Yes. We offer custom grade, particle size and purity adjustment based on your application and order volume.
MOQ depends on the product; small quantities are supported for R&D and trial runs.
Every batch is tested in-house and retains full traceability from raw material to finished goods.
Why Choose ChemSP
Request a Quote
Looking for pricing, availability or technical data for Sodium thiosulfate pentahydrate?
Email us at sales@chemsp.com or use the button above. Our team typically responds within 1 business day.
About ChemSP
ChemSP
We are a professional chemical supplier based in Jinan, China. Since 2013, we have been connecting manufacturers and global B2B buyers with reliable sourcing, quality-controlled products and efficient logistics.
Our business covers food & feed additives, fine chemicals, pharmaceutical intermediates, eco-materials, coatings and specialty chemicals — all non-hazardous and compliant with our licensed scope.