Acids & Salts Available — Bulk Only

Sodium Persulfate (Sodium Persulphate)

Na2S2O8
CAS 7775-27-1 · Formula Na2O8S2 · MW 238.11 g/mol

A stable, water-soluble persulfate oxidant for radical initiation and oxidation duties. It functions as a bleaching and oxidizing agent and as an initiator for emulsion and solution polymerization.

Safety Data Sheet
UN Number
UN 1505
Hazard Class
Class 5.1
HS Code
2833.40
At a Glance
Material Family
Acids & Salts
Record Type
Pure compound
Primary Role
Crosslinking / Curing
Functional Roles
SODIUM PERSULFATE
OXIDISING
Applications & Use Cases
  • Polymerization initiator: Initiates emulsion and solution polymerization.
  • Oxidizing agent: Strong oxidant for chemical processing.
  • Bleaching agent: Used for oxidative bleaching.
  • Battery manufacture: Used as a battery depolarizer.
Physical Properties
Physical Description
Sodium persulfate appears as a white crystalline solid. Very irritating to skin and eyes. May be toxic by skin absorption. Used as a bleaching agent
Solubility
Solubility in water, g/100ml at 20 °C: 55.6
Density
1.1 g/cm³
Vapor Density
1.1
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

DOT / UN Transport Classification
DOT hazard class 5.1 placard
UN / DOT NumberUN 1505
Hazard Class / DivisionClass 5.1
Packing GroupIII
Proper Shipping NameSodium persulfate

Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.

HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2833 . 40
Chapter 28
Inorganic chemicals; compounds of precious metals and rare-earth metals
Heading 28.33
Internationally harmonized (WCO HS)
Subheading 2833.40
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
7775-27-1
Molecular Formula
Na2O8S2
Molecular Weight
238.11 g/mol
IUPAC Name
disodium;sulfonatooxy sulfate
INCI Name
SODIUM PERSULFATE
PubChem CID
InChI Key
CHQMHPLRPQMAMX-UHFFFAOYSA-L
Synonyms & Trade Names
Sodium persulfate Sodium peroxydisulfate Sodium peroxodisulfate Peroxydisulfuric acid, disodium salt Persulfate de sodium Disodium peroxydisulfate ORISTAR SP Peroxydisulfuric acid (((HO)S(O)2)2O2), disodium salt DISODIUM PEROXODISULFATE SODIUM PERSULFATE (NA2S2O8) Peroxydisulfuric acid (((HO)S(O)2)2O2), sodium salt (1:2) Disodium peroxodisulphate disodium;sulfonatooxy sulfate Sodium peroxydisulphate UN1505
Full Description

Sodium persulfate (CAS 7775-27-1, Na2S2O8) is a water-soluble oxidizing salt. It functions as a bleaching and oxidizing agent and as an initiator for emulsion and solution polymerization. It is also used as a depolarizer in battery manufacture.

Frequently Asked Questions

What is sodium persulfate used for?

Sodium persulfate (CAS 7775-27-1, Na2S2O8) is a water-soluble oxidizing salt used as an initiator for emulsion and solution polymerization, as a strong oxidizing agent for chemical processing, and as an oxidative bleaching agent. It is also used as a depolarizer in battery manufacture. RawSource supplies it in bulk for these industrial applications.

Is sodium persulfate a bleach?

It functions as an oxidative bleaching agent, releasing active oxygen as an oxidizer rather than acting as a chlorine-based bleach. It is most commonly used as a polymerization initiator and chemical oxidant. Match the grade to your bleaching or oxidation process when ordering.

What is another name for sodium persulfate?

It is also called sodium peroxydisulfate or sodium peroxodisulfate, CAS 7775-27-1, formula Na2S2O8. Note that it is distinct from sodium bisulfate (a different acid salt). Verify the CAS on the CoA to avoid confusing the two.

What is the UN number and HS code for sodium persulfate?

It ships under UN 1505 and classifies under HS 2833.40 (peroxosulphates/persulphates). As an oxidizer it carries specific DOT shipping requirements; confirm classification and packaging against the current SDS before transport. RawSource provides the SDS with every shipment.

What is the cost of bulk sodium persulfate?

Bulk pricing depends on grade, order volume, and packaging (drums, totes, or IBCs). Request a current quote from RawSource with your target quantity and we will return delivered pricing plus a CoA and SDS.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.