| Description | |
|---|---|
| Catalogue Number | 100565 |
| Synonyms | Orthophosphoric acid, o-Phosphoric acid |
| Description | ortho-Phosphoric acid 99% |
| Product Information | |
|---|---|
| CAS number | 7664-38-2 |
| EC index number | 015-011-00-6 |
| EC number | 231-633-2 |
| Hill Formula | H₃O₄P |
| Chemical formula | H₃PO₄ |
| Molar Mass | 97.99 g/mol |
| HS Code | 2809 20 00 |
| Physicochemical Information | |
|---|---|
| Density | 1.84 g/cm3 (38 °C) |
| Melting Point | 41.1 °C |
| pH value | <0.5 (100 g/l, H₂O, 20 °C) |
| Vapor pressure | 0.04 hPa (20 °C) |
| Solubility | 750 - 850 g/l |
| Toxicological Information | |
|---|---|
| LD 50 dermal | LD50 Rabbit 2740 mg/kg |
| Safety Information according to GHS | |
|---|---|
| Hazard Pictogram(s) |  |
| Hazard Statement(s) | H290: May be corrosive to metals. 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 |
| Storage class | 8B Non-combustible, corrosive hazardous materials |
| WGK | WGK 1 slightly water endangering |
| Disposal | 12 Inorganic acids and anhydrides thereof should first be diluted or hydrolyzed by stirring carefully into ice water and then neutralized (protective gloves, fume cupboard!) with sodium hydroxide solution (Cat. No. 105587). Before filling into container D, check the pH with pH universal indicator strips (Cat. No. 109535). Fuming sulfuric acid should be carefully stirred dropwise into 40 % sulfuric acid (Cat. No. 109286). Ensure that plenty of ice is available for cooling! When sufficiently cool, treat the highly concentrated sulfuric acid as described above. Analogous to this procedure, other anhydrides can be converted into their corresponding acids. Acid gases (e.g. hydrogen halide, chlorine, phosgene, sulfur dioxide) can be introduced into dilute sodium hydroxide solution and after neutralization disposed of in container D. |
| Safety Information | |
|---|---|
| Hazard Symbols |  Corrosive |
| Categories of danger | corrosive |
| R Phrase | R 34 Causes burns. |
| S Phrase | S 26-45 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible). |
| Storage and Shipping Information | |
|---|---|
| Storage | Store below +30°C. |
| Transport Information | |
|---|---|
| Declaration (railroad and road) ADR, RID | UN 3453 , 8, III |
| Declaration (transport by air) IATA-DGR | UN 3453 , 8, III |
| Declaration (transport by sea) IMDG-Code | UN 3453 , 8, III, Segregation Group: 1 (Acids) |
| Specifications | |
|---|---|
| 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 |