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PHOSPHORUS ACID CRYSTALS Extra Pure

Phosphonic acid

Article No. 5256D Grade Extra Pure
Purity 98% CAS No. 13598-36-2
Molecular Formula H3PO3 Molecular Weight 82.00
H.S. Code 2811.1990 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour Colorless crystals
Odour Odorless pH value 1
Melting point/ Freezing point [°C] 73°C Boiling point [°C] 200°C
Vapour pressure [20°C] < 1 hPa at 20 °C Density [g/cm3] 1.651
Solubility in water [% weight] Soluble in water

Specifications

Appearance Colorless hygroscopic crystals Assay Min 98%
Assay (as H3PO4) Max 1% Heavy metal (as Pb) Max 0.002%

Safety Information and Hazard Symbols

Corrosion Exclamation Mark
Symbol: GHS05, GHS07
Signal Word: Danger
UN No.: 2834
IMCO Class No.: 8
Packing Group: III
Hazardous Statement: H302-H314
Precaution Statement: P280-P301+P330+P331-P303+P361+P353-P305 + P351 + P338
Revision Date: 20-Mar-2024

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