| Product Identification | Back to Contents | 【Product Name】
Sodium dichromate | 【Synonyms】
Disodium oxido-(oxido-dioxochromio)oxy-dioxochromium dihydrate
Sodium bichromate dihydrate | 【CAS】
7789-12-0 | 【Formula】
Cr2H4Na2O9 | 【Molecular Weight】
298 | 【EINECS】
234-190-3 | 【RTECS】
HX7750000 | 【RTECS Class】
Tumorigen; Mutagen | 【Merck】
12,8754 | 【Beilstein/Gmelin】
34318 (G) | 【EC Index Number】
024-004-01-4 | 【EC Class】
Carcinogenic Category 2; Mutagenic Category 2; Very toxic; Toxic; Harmful; Irritant; Sensitising; Dangerous for the Environment |
| Physical and Chemical Properties | Back to Contents | 【Appearance】
Bright orange-yellow crystal or powder. | 【Solubility in water】
234 g/L (25 C) | 【Melting Point】
356.7 | 【Density】
2.35 g/cm3 (13 C) | 【Usage】
Oxidizing agent in manufacture of dyes, many other synthetic organic chemicals, inks etc.; In chrome-tanning of hides; in electric batteries; bleaching fats, oils, sponges, resins; refining petroleum; manufacture chromic acid, other chromates and chrome pigments; in corrosion inhibitors, corrosion-inhibiting paints; in many metal treatments; electroengraving of copper; mordant in dyeing. | 【Vapor Density】
10.3 | 【Refractive Index】
1.661 (17 C) |
| First Aid Measures | Back to Contents | 【Ingestion】
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately. | 【Inhalation】
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration. | 【Skin】
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. | 【Eyes】
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. |
| Handling and Storage | Back to Contents | 【Storage】
Keep away from heat, sparks, and flame. Do not store near combustible materials. Store in a cool, dry, well-ventilated area away from incompatible substances. | 【Handling】
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Avoid contact with clothing and other combustible materials. Avoid ingestion and inhalation. |
| Hazards Identification | Back to Contents | 【Inhalation】
Causes respiratory tract irritation. May cause ulceration and perforation of the nasal septum if inhaled in excessive quantities. | 【Skin】
Causes skin burns. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. May be harmful if absorbed through the skin. | 【Eyes】
Contact with eyes may cause severe irritation, and possible eye burns. | 【Ingestion】
Harmful if swallowed. Causes gastrointestinal tract burns. May cause kidney damage. | 【Hazards】
Strong oxidizer. Contact with combustible materials may cause a fire. | 【EC Risk Phrase】
R 49 46 21 25 26 37/38 41 43 50/53 | 【EC Safety Phrase】
S 53 45 60 61 | 【UN (DOT)】
1479 |
| Exposure Controls/Personal Protection | Back to Contents | 【Personal Protection】
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear a chemical apron. Wear appropriate clothing to prevent skin exposure. | 【Respirators】
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. | 【Exposure Effects】
Prolonged or repeated skin contact may cause dermatitis. Prolonged or repeated exposure may lead to asthma and perforation of the nasal septum. | 【Exposure limit(s)】
TLV: 0.025 ppm; 0.16 mg/m3 (ACGIH 1991-1992). NIOSH REL: Ca 0.001 mg Cr(VI)/m3 See Appendix A See Appendix C NIOSH IDLH: Potential occupational carcinogen | 【Poison Class】
3 (Strong toxins) |
| Fire Fighting Measures | Back to Contents | 【Flash Point】
400 | 【Fire Fighting】
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Strong oxidizer. Contact with combustible materials may cause a fire. Wear appropriate protective clothing to prevent contact with skin and eyes. Wear a self-contained breathing apparatus (SCBA) to prevent contact with thermal decomposition products. Use water with caution and in flooding amounts. Extinguishing media: Use water only! Contact professional fire-fighters immediately. | 【Fire Potential】
These substances will accelerate burning when involved in a fire. |
| Accidental Release Measures | Back to Contents | 【Small spills/leaks】
Vacuum or sweep up material and place into a suitable disposal container. Do not flush into a sewer. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Remove all sources of ignition. |
| Stability and Reactivity | Back to Contents | 【Incompatibilities】
Reducing agents. | 【Stability】
Stable under normal temperatures and pressures. | 【Decomposition】
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, sodium oxide, chromium dioxide. | 【Combustion Products】
Fire may produce irritating, corrosive and/or toxic gases. |
|
|