Sodium Thiosulfate Pentahydrate, also known as Disodium Sulfurothioate Pentahydrate, and
Sodium Hyposulfite Pentahydrate is a hydrate of Sodium Thiosulfate with 5 mol eq. of Water.
having the chemical formula H10Na2O8S2 or Na2S2O3-5H2O. It appears as colorless to white
hygroscopic crystals, chunks, or crystalline powder with no odor. It is sparingly soluble in Water
and insoluble in Alcohol at ambient conditions. When heated to around 300 o C, it undergoes
decomposition emitting highly toxic fumes of Disodium Oxide and Sulfur Oxides. Commercially,
it is produced by reacting by-product liquid of Sodium Sulfide synthesis with Sulfur Dioxide.
Chemically pure or Laboratory reagents are the two terms often used to describe Lab Grade
chemicals. Lab Grade chemicals do not meet any accepted quality or purity requirements such as
the ACS Grade, the USP Grade, and the FCC Grade, despite their acceptable purity. In the United
States of America (USA), Lab Alley is selling its high-quality Sodium Thiosulfate, Anhydrous,Lab Grade online at laballey.com. Due to its high purity, this Lab Alley product is highly
recommended for labs and commercial applications.
Competitive pricing and well-stocked US-based inventory.
Fast 1-2 business days shipping, including hazmat transport.
Exceptional customer service and chemical technical support.
Delivery on budget, on time, every time.
Product Information
More Information
CAS
0102-17-7
Assay
99.0-100.5%
Grade
Lab Grade
Molecular formula
Na2S2O3-5H2O
Molecular weight
248.19
Arsenic (As)
3 ppm
Autoship Available
No
Calcium (Ca)
To Pass Test
Reviews
Safety and Shipping
Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Sodium Thiosulfate Crystal Pentahydrate Lab grade.
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This chemical will only be shipped to addresses that are:
Businesses
Schools and Universities
Laboratories
If you use a residential address during checkout, we will automatically remove this item from your order prior to shipping.
If your order includes more than 1 lb of mercury, it must be shipped to a commercial address, lab, or school.
Please note that we’re unable to ship mercury—of any amount—to apartments or shipping/parcel stores.
Ineligible orders will be automatically canceled.
If you are purchasing SDA in 5 gallons or more, you are required to provide a TTB permit showing how much of the product you are allowed to purchase per year. Please email your TTB permit to customercare@laballey and include your Order Number.
