| Description | |
|---|---|
| Catalogue Number | 104864 |
| Replaces | PX1445-2; PX1445 |
| Synonyms | Potassium bichromate, Potassium pyrochromate |
| Product Information | |
|---|---|
| CAS number | 7778-50-9 |
| EC index number | 024-002-00-6 |
| EC number | 231-906-6 |
| Grade | ACS,ISO,Reag. Ph Eur |
| Hill Formula | Cr₂K₂O₇ |
| Chemical formula | K₂Cr₂O₇ |
| Molar Mass | 294.19 g/mol |
| HS Code | 2841 50 00 |
| Applications | |
|---|---|
| Application | Potassium dichromate for analysis EMSURE® ACS,ISO,Reag. Ph Eur. CAS No. 7778-50-9, EC Number 231-906-6. |
| Physicochemical Information | |
|---|---|
| Boiling point | >500 °C (1013 hPa) |
| Density | 2.7 g/cm3 (20 °C) |
| Melting Point | 398 °C |
| pH value | 3.6 (100 g/l, H₂O) |
| Bulk density | 1250 kg/m3 |
| Solubility | 115 g/l |
| Toxicological Information | |
|---|---|
| LD 50 oral | LD50 Rat 90.5 mg/kg |
| LD 50 dermal | LD50 Rat 1170 mg/kg |
| Safety Information according to GHS | |
|---|---|
| Hazard Pictogram(s) |  |
| Hazard Statement(s) | H340: May cause genetic defects. H350: May cause cancer. H360FD: May damage fertility. May damage the unborn child. H272: May intensify fire; oxidizer. H301: Toxic if swallowed. H312: Harmful in contact with skin. H314: Causes severe skin burns and eye damage. H317: May cause an allergic skin reaction. H330: Fatal if inhaled. H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled. H335: May cause respiratory irritation. H372: Causes damage to organs through prolonged or repeated exposure. H410: Very toxic to aquatic life with long lasting effects. |
| Precautionary Statement(s) | P201: Obtain special instructions before use. P221: Take any precaution to avoid mixing with combustibles, heavy-metal compounds, acids and alkalis. P273: Avoid release to the environment. P280: Wear protective gloves/ protective clothing/ eye protection/ face protection. P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P302 + P352: IF ON SKIN: Wash with plenty of soap and water. P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. 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. |
| RTECS | HX7680000 |
| Storage class | 5.1B Oxidizing hazardous materials |
| WGK | WGK 3 highly water endangering |
| Disposal | 22 Inorganic peroxides and oxidants as well as bromine and iodine should be rendered harmless by reduction with acidic sodium thiosulfate solution (Cat. No. 106513); container D or E. Slightly soluble oxidants should be collected separately in container E or I. |
| Safety Information | |
|---|---|
| Hazard Symbols | Dangerous for the environmentVery toxicOxidising |
| Categories of danger | carcinogenic, mutagenic, toxic for reproduction, oxidizing, very toxic, corrosive, sensitizing, dangerous for the environment |
| R Phrase | R 45-46-60-61-21-25-26-48/23- 8-34-42/43-50/53 May cause cancer.May cause heritable genetic damage.May impair fertility.May cause harm to the unborn child.Also harmful in contact with skin.Also toxic if swallowed.Also very toxic by inhalation.Also toxic: danger of serious damage to health by prolonged exposure through inhalation.Contact with combustible material may cause fire.Causes burns.May cause sensitisation by inhalation and skin contact.Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| S Phrase | S 53-45-60-61 Avoid exposure - obtain special instructions before use.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).This material and its container must be disposed of as hazardous waste.Avoid release to the environment. Refer to special instructions/ Safety data sheets. |
| Storage and Shipping Information | |
|---|---|
| Storage | Store below +30°C. |
| Transport Information | |
|---|---|
| Declaration (railroad and road) ADR, RID | UN 3086 , 6.1 (5.1), II |
| Declaration (transport by air) IATA-DGR | UN 3086 , 6.1 (5.1), II |
| Declaration (transport by sea) IMDG-Code | UN 3086 , 6.1 (5.1), II |
| Specifications | |
|---|---|
| Assay (iodometric, calc. on dried substance) | ≥ 99.9 % |
| Insoluble matter | ≤ 0.005 % |
| Chloride (Cl) | ≤ 0.001 % |
| Sulphate (SO₄) | ≤ 0.005 % |
| Ca (Calcium) | ≤ 0.002 % |
| Cu (Copper) | ≤ 0.001 % |
| Fe (Iron) | ≤ 0.001 % |
| Na (Sodium) | ≤ 0.02 % |
| Pb (Lead) | ≤ 0.005 % |
| Loss on drying (130 °C) | ≤ 0.05 % |