1.00565

ortho-Phosphoric acid

99%, cryst. for analysis EMSURE^®

• Synonym(s): Phosphoric acid, Orthophosphoric acid, o-Phosphoric acid, Orthophosphoric acid
• Linear Formula: H₃PO₄
• CAS Number: 7664-38-2
• Molecular Weight: 98.00
• Beilstein/REAXYS Number: 1921286
• MDL number: MFCD00011340
• UNSPSC Code: 12352301
• EC Index Number: 231-633-2
• NACRES: NA.21

Properties

• product name: ortho-Phosphoric acid 99%, cryst. for analysis EMSURE^®
• vapor density: 3.4 (vs air)
• Quality Level: 300
• vapor pressure: 2.2 mmHg ( 20 °C); 5 mmHg ( 25 °C)
• product line: EMSURE^®
• assay: ≥99% (acidimetric)
• form: solid
• potency: 2740 mg/kg LD₅₀, skin (Rabbit)
• concentration: 85% phosphoric acid
• impurities: ≤20 ppm Substances reducing potassium permanganate (as O); ≤20 ppm Volatile acids (as CH₃COOH)
• pH: <0.5 (20 °C, 100 g/L in H₂O)
• bp: 158 °C (lit.)
• mp: ~40 °C (lit.)
• solubility: 750-850 g/L
• density: 1.685 g/mL at 25 °C (lit.); 1.84 g/cm³ at 38 °C
• anion traces: chloride (Cl^-): ≤2 ppm; fluoride (F^-): ≤0.5 ppm; nitrate (NO₃^-): ≤2 ppm; phosphite, hypophosphite (as H₃PO₃): ≤500 ppm
• cation traces: As: ≤1 ppm; Ca: ≤20 ppm; Cd: ≤1 ppm; Co: ≤1 ppm; Cu: ≤1 ppm; Fe: ≤10 ppm; K: ≤5 ppm; Mg: ≤1 ppm; Mn: ≤1 ppm; Na: ≤50 ppm; Ni: ≤1 ppm; Pb: ≤1 ppm; Sb: ≤1 ppm; Zn: ≤1 ppm
• storage temp.: 2-30°C
• SMILES string: OP(O)(O)=O
• InChI: 1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)
• InChI key: NBIIXXVUZAFLBC-UHFFFAOYSA-N

Description

Other Notes

Concentrated phosphoric acid is approx. 85% H₃PO₄ (aqueous).

Analysis Note

Assay (acidimetric): ≥ 99 %
Identity: passes test
Chloride (Cl): ≤ 2 ppm
Nitrate (NO₃): ≤ 2 ppm
Phosphite and Hypophosphite (as H₃PO₃): ≤ 500 ppm
Fluoride (F): ≤ 0.5 ppm
As (Arsenic): ≤ 1 ppm
Ca (Calcium): ≤ 20 ppm
Cd (Cadmium): ≤ 1 ppm
Co (Cobalt): ≤ 1 ppm
Cu (Copper): ≤ 1 ppm
Fe (Iron): ≤ 10 ppm
K (Potassium): ≤ 5 ppm
Mg (Magnesium): ≤ 1 ppm
Mn (Manganese): ≤ 1 ppm
Na (Sodium): ≤ 50 ppm
Ni (Nickel): ≤ 1 ppm
Pb (Lead): ≤ 1 ppm
Sb (Antimony): ≤ 1 ppm
Zn (Zinc): ≤ 1 ppm
Volatile acids (as CH₃COOH): ≤ 20 ppm
Substances reducing potassium permanganate (as O): ≤ 20 ppm

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• pictograms: GHS05,GHS07
• signalword: Danger
• hcodes: H290 - H302 - H314
• pcodes: P234 - P260 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B
• Storage Class: 8A - Combustible, corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable