Key Spec Table
| CAS # | EC Number | Hill Formula | Chemical Formula | Molar Mass | Grade Value |
|---|
| 7789-12-0 | 234-190-3 | Cr₂Na₂O₇*2H₂O | Na₂Cr₂O₇ * 2 H₂O | 278 g/mol | ACS |
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| Description |
|---|
| Catalogue Number | 106336 |
| Synonyms | Sodium bichromate, Sodium pyrochromate |
| Product Information |
|---|
| CAS number | 7789-12-0 |
| EC index number | 024-004-00-7 |
| EC number | 234-190-3 |
| Grade | ACS |
| Hill Formula | Cr₂Na₂O₇*2H₂O |
| Chemical formula | Na₂Cr₂O₇ * 2 H₂O |
| Molar Mass | 278 g/mol |
| HS Code | 2841 30 00 |
| Quality Level | MQ300 |
| Physicochemical Information |
|---|
| Boiling point | 400 °C (1013 hPa) (decomposition) |
| Density | 2.52 g/cm3 (20 °C) |
| Melting Point | 356.7 °C (anhydrous substance) |
| pH value | 3.5 (100 g/l, H₂O, 20 °C) |
| Bulk density | 1200 kg/m3 |
| Solubility | 731.8 g/l |
| Toxicological Information |
|---|
| LD 50 oral | LD50 Rat 50 mg/kg |
| LD 50 dermal | LD50 Rabbit 1000 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.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 | HX7750000 |
| 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, very toxic, oxidizing, 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) | 99.5 - 100.5 % |
| Identity | passes test |
| Insoluble matter | ≤ 0.005 % |
| Chloride (Cl) | ≤ 0.002 % |
| Sulfate (SO₄) | ≤ 0.01 % |
| Al (Aluminium) | ≤ 0.002 % |
| Ca (Calcium) | ≤ 0.002 % |
| Cu (Copper) | ≤ 0.001 % |
| Fe (Iron) | ≤ 0.002 % |
| K (Potassium) | ≤ 0.01 % |
| Mg (Magnesium) | ≤ 0.005 % |
| Pb (Lead) | ≤ 0.002 % |
