Description Catalogue Number 105032 Synonyms Potash caustic Product Information CAS number 1310-58-3 EC index number 019-002-00-8 EC number 215-181-3 Grade Ph Eur,BP,JP,NF,FCC,E 525 Hill Formula HKO Chemical formula KOH Molar Mass 56.11 g/mol HS Code 2815 20 00 Physicochemical Information Density 2.04 g/cm3 (20 °C) Melting Point 360 °C pH value 14 (56 g/l, H₂O, 20 °C) Solubility 1130 g/l Toxicological Information LD 50 oral LD50 Rat 333 mg/kg Safety Information according to GHS Hazard Pictogram(s) Hazard Statement(s) H290: May be corrosive to metals. H302: Harmful if swallowed. H314: Causes severe skin burns and eye damage. Precautionary Statement(s) P280: Wear protective gloves/ protective clothing/ eye protection/ face protection. P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician. Signal Word Danger RTECS TT2100000 Storage class 8B Non-combustible, corrosive hazardous materials WGK WGK 1 slightly water endangering Disposal 13 Bases and alcoholates should be diluted if necessary by carefully stirring them into water and then neutralized (protective gloves, fume cupboard!) with hydrochloric acid (Cat. No. 100312). Before placing in container D, check the pH with pH universal indicator strips (Cat. No. 109535). Safety Information Hazard Symbols Corrosive Categories of danger harmful, corrosive R Phrase R 22-35 Harmful if swallowed.Causes severe burns. S Phrase S 26-36/37/39-45 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable protective clothing, gloves and eye/face protection.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible). Storage and Shipping Information Storage Store at +5°C to +30°C. Transport Information Declaration (railroad and road) ADR, RID UN 1813 , 8, II Declaration (transport by air) IATA-DGR UN 1813 , 8, II Declaration (transport by sea) IMDG-Code UN 1813 , 8, II, Segregation Group: 18 (Alkalis) Specifications Assay (acidimetric, KOH) ≥ 85.0 % Assay (total alkalinity calc. as KOH) 85.0 - 100.5 % Assay (K) ≥ 59.9 % Identity passes test Appearance of solution passes test Insoluble substances passes test Carbonate (as K₂CO₃) ≤ 2.0 % Chloride (Cl) ≤ 0.008 % Phosphate (PO₄) ≤ 0.002 % Silicate (SiO₂) ≤ 0.01 % Sulfate (SO₄) ≤ 0.005 % Total nitrogen (N) ≤ 0.0005 % Heavy metals (as Pb) ≤ 0.0005 % Al (Aluminium) ≤ 0.001 % As (Arsenic) ≤ 0.0003 % Ca (Calcium) ≤ 0.002 % Cu (Copper) ≤ 0.0005 % Fe (Iron) ≤ 0.001 % Hg (Mercury) ≤ 0.00001 % Na (Sodium) ≤ 1.0 % Pb (Lead) ≤ 0.0002 % Zn (Zinc) ≤ 0.0025 % Residual solvents (Ph Eur/USP/ICH) excluded by manufacturing process Elemental impurity specifications have been set considering ICH Q3D (Guideline for Elemental Impurities). Class 1-3 elements are not likely to be present above the ICH Q3D option 1 limit, unless specified and indicated (*). Conforms to Ph Eur, BP, JP, NF, FCC, E525 Conforms to the purity criteria on food additives according to the current European Commission Regulation.
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