Sodium Pyrosulfate (Na2S2O7)

Technical Information

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

Professional Uses

• Sample Preparation (Material Analysis): flux for fusion of mineral and oxide samples in preparation of XRF discs and ICP/OES solutions.
• Classical Analysis: strongly acidic reagent for decomposition and mineralization of difficult-to-dissolve samples.
• Inorganic Synthesis: raw material for acid sulfates and low pH environments in laboratory and processing operations.

Hazard Statements (H)

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

Precautionary Statements (P)

• P260: Do not breathe dust.
• P264: Wash hands thoroughly after handling.
• P280: Wear protective gloves/protective clothing and eye/face protection.
• P301+P330+P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
• P303+P361+P353: IF ON SKIN (or hair): Remove immediately all contaminated clothing. 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, well-ventilated area. Protect from moisture and contamination. Keep away from alkalis, acid-reactive substances, and sensitive metals. Keep container upright, properly labeled, and out of reach of unauthorized persons.