Sodium Pyrosulfate (Na2S2O7)

Technical Information

• Chemical Formula: Na2S2O7
• CAS Number: 13870-29-6
• EC Number: 237-625-5
• Synonyms: Disodium Disulfate
• English Name: Sodium Pyrosulfate
• Grade/Purity: pure
• Molar Mass: 222.1 g/mol

Professional Applications

• Sample Preparation (Material Analysis): Flux for melting mineral and oxide samples in the preparation of pellets for XRF and solutions for ICP/OES.
• Classical Analysis: Strong acidic reagent for decomposition and mineralization of difficult-to-dissolve samples.
• Inorganic Synthesis: Raw material for acidic sulfate and low-pH environments in laboratory and process procedures.

Hazard Statements (H)

• H314: Causes severe skin burns and serious eye damage.
• H335: May cause respiratory irritation.

Precautionary Statements (P)

• P260: Do not breathe dust.
• P264: Wash hands thoroughly after handling.
• P280: Wear gloves/protective clothing and eye protection/face protection.
• P301+P330+P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
• P303+P361+P353: IF ON SKIN (or hair): Remove all contaminated clothing immediately. Rinse skin with water/shower.
• P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes; remove contact lenses if present and easy to do; continue rinsing.
• P310: Immediately call a POISON CENTER/doctor.

Recommended Storage Conditions

Store in a tightly closed, dry container in a cool and well-ventilated place. Protect from moisture and contamination. Keep away from bases, acidic substances, and sensitive metals. Store containers upright, properly labeled, and inaccessible to unauthorized persons.