1.05002

Potassium hydroxide hydrate

99.995 Suprapur^®

• Synonym(s): Potassium hydroxide hydrate, caustic potash monohydrate
• Empirical Formula (Hill Notation): HKO · xH₂O
• CAS Number: 26288-25-5
• Molecular Weight: 56.11 (anhydrous basis)
• UNSPSC Code: 12352305
• EC Index Number: 246-324-8
• NACRES: NA.21

Properties

• grade: for inorganic trace analysis
• Quality Level: 100
• assay: 99.995%
• form: solid
• potency: 333 mg/kg LD₅₀, oral (Rat)
• pH: >13.5 (20 °C, 50 g/L in H₂O)
• bp: 1320 °C/1013 hPa
• mp: 143 °C
• storage temp.: 2-30°C
• InChI: 1S/K.2H2O/h;2*1H2/q+1;;/p-1
• InChI key: LUMVCLJFHCTMCV-UHFFFAOYSA-M

Description

Analysis Note

Purity (metallic): ≥ 99.995 %
Assay of KOH‧1H₂O: ≥ 85 %
Assay of potassium carbonate: ≤ 1.0 %
Chloride (Cl): ≤ 1.0 ppm
Phosphate (PO₄): ≤ 0.05 ppm
Silicate (as SiO₂): ≤ 5 ppm
Sulfate (SO₄): ≤ 5 ppm
Al (Aluminium): ≤ 0.05 ppm
As (Arsenic): ≤ 0.1 ppm
Ba (Barium): ≤ 10.0 ppm
Ca (Calcium): ≤ 0.5 ppm
Cd (Cadmium): ≤ 0.01 ppm
Ce (Cerium): ≤ 0.01 ppm
Co (Cobalt): ≤ 0.010 ppm
Cr (Chromium): ≤ 0.010 ppm
Cu (Copper): ≤ 0.010 ppm
Eu (Europium): ≤ 0.010 ppm
Fe (Iron): ≤ 0.05 ppm
Hg (Mercury): ≤ 0.01 ppm
La (Lanthanum): ≤ 0.010 ppm
Li (Lithium): ≤ 0.5 ppm
Mg (Magnesium): ≤ 0.10 ppm
Mn (Manganese): ≤ 0.050 ppm
Na (Sodium): ≤ 5 ppm
Ni (Nickel): ≤ 0.010 ppm
Pb (Lead): ≤ 0.010 ppm
Sc (Scandium): ≤ 0.010 ppm
Sm (Samarium): ≤ 0.010 ppm
Sr (Strontium): ≤ 0.50 ppm
Tl (Thallium): ≤ 0.01 ppm
Y (Yttrium): ≤ 0.010 ppm
Yb (Ytterbium): ≤ 0.010 ppm
Zn (Zinc): ≤ 0.050 ppm

Legal Information

SUPRAPUR 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. 1A
• Storage Class: 8A - Combustible, corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable