MERCK 104864.1000 Potassium Dichromate cryst. GR,ACS, ISO CAS No.7778-50-9
| 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 14 |
| Quality Level | MQ300 |
| Physicochemical Information |
|---|
| Boiling point | >500 °C (1013 hPa) |
| Density | 2.680 g/cm3 (20 °C) |
| Melting Point | 390 °C |
| pH value | 3.5 - 5.0 (29.4 g/l, H₂O, 25 °C) |
| 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) | 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.H340: May cause genetic defects.H350: May cause cancer.H360FD: May damage fertility. May damage the unborn child.H372: Causes damage to organs through prolonged or repeated exposure if inhaled.H410: Very toxic to aquatic life with long lasting effects. |
| Precautionary Statement(s) | P210: Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.P260: Do not breathe dust.P280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection.P303 + P361 + P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water.P304 + P340 + P310: IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor.P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. |
| Signal Word | Danger |
| RTECS | HX7680000 |
| Storage class | 5.1B Oxidizing hazardous materials |
| WGK | WGK 3 highly hazardous to water |
| Disposal | 22Inorganic 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 |
|---|
| Categories of danger | carcinogenic, mutagenic, toxic for reproduction, oxidizing, very toxic, corrosive, sensitizing, dangerous for the environment |
| Storage and Shipping Information |
|---|
| Storage | Store at +2°C to +30°C. |
| Transport Information |
|---|
| Declaration (railroad and road) ADR, RID | UN 3087, 5.1 (6.1), II |
| Declaration (transport by air) IATA-DGR | UN 3087, 5.1 (6.1), II |
| Declaration (transport by sea) IMDG-Code | UN 3087, 5.1 (6.1), II |
| Specifications |
|---|
| Assay (iodometric, calc. on dried substance) | ≥ 99.9 % |
| Insoluble matter | ≤ 0.005 % |
| Chloride (Cl) | ≤ 0.001 % |
| Sulfate (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 % |
| Global Trade Item Number |
|---|
| Catalogue Number | GTIN |
|---|
| 1048640500 | 04022536055800 |
| 1048641000 | 04022536055824 |
