Oxalic acid
- Ethanedioic acid
Oxalic acid | |
| |
| Formula | (COOH)2 |
| Structure | |
| Description | Odorless white solid. |
| Uses | Scouring agent in textile finishing, stripping, cleaning, for bleach & stain remover, rust, grease, and wax removing agent in metal cleaning, chemical int. |
| Registry Numbers and Inventories. | |
| CAS | 144-62-7 |
| EC (EINECS/ELINCS) | 205-634-3 |
| EC Index Number | 607-006-00-8 |
| EC Class | Harmful |
| RTECS | RO2450000 |
| RTECS class | Reproductive Effector; Human Data; Primary Irritant |
| UN (DOT) | 3261 |
| Merck | 12,7043 |
| Beilstein/Gmelin | 385686 |
| Beilstein Reference | 4-02-00-01819 |
| EPA OPP | 9601 |
| Swiss Giftliste 1 | G-2077 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Properties. | |
| Formula | C2H2O4 |
| Formula mass | 90.04 |
| Melting point, °C | 99 - 100 |
| Boiling point, °C | 365 |
| Decomposition point, °C | 188 |
| Vapor pressure, mmHg | 2.5E-5 (25 C) |
| Vapor density (air=1) | 4.3 |
| Density | 1.948 g/cm3 (-143 C) |
| Solubility in water | 140 g/L |
| pKa/pKb | 1.46 (pKa) |
| Partition coefficient, pKow | -0.62 |
| Heat of vaporization | 67.2 kJ/mol |
| Heat of combustion | -245.6 kJ/mol |
| Hazards and Protection. | |
| Storage | Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. |
| Handling | Wash thoroughly after handling. Use only in a well ventilated area. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Discard contaminated shoes. |
| 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 protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure. |
| Respirators | Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary. |
| Small spills/leaks | Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation. |
| Stability | Stable under normal temperatures and pressures. |
| Incompatibilities | Strong oxidizing agents, bases, hypochlorite, sodium chloride, stong alkalies, chlorites. |
| Decomposition | Carbon monoxide, carbon dioxide, acrid smoke and fumes, formic acid. |
| Fire. | ||||
| Flash Point,°C | 189 | |||
| Upper exp. limit, % | 28 | |||
| Lower exp. limit, % | 8.5 | |||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Substance is noncombustible. Contact with metals may evolve flammable hydrogen gas. Containers may explode if exposed to fire. Extinguishing media: Do NOT get water inside containers. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray. Cool containers with flooding quantities of water until well after fire is out. | |||
| Fire potential | Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. | |||
| Hazards | Contact with metals may evolve flammable hydrogen gas. | |||
| Combustion products | Generates poisonous gases | |||
| NFPA | Health | 3 | ||
| Flammability | 1 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | TLV: ppm; 1 mg/m3; 2 mg/m3 (STEL) (ACGIH 1995-1996). OSHA PEL: TWA 1 mg/m3 NIOSH REL: TWA 1 mg/m3 ST 2 mg/m3 NIOSH IDLH: 500 mg/m3 |
| Poison_Class | 2 |
| Exposure effects | Increased deep tendon reflexes, drowsiness, stupor, seizures and coma may be noted. |
| Ingestion | Causes gastrointestinal tract burns. The toxicological properties of this substance have not been fully investigated. May cause nervous system |
| Inhalation | Causes chemical burns to the respiratory tract. The toxicological properties of this substance have not been fully investigated. |
| Skin | Causes skin burns. |
| Eyes | Causes eye burns. |
First aid |
|
| 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 | Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask. |
| 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. Destroy contaminated shoes. |
| Eyes | 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. Extensive irrigation is required (at least 30 minutes). |
| Transport. | ||
| UN number | 3261 | |
| Response guide | 154 | |
| Hazard class | 8 | |
| Packing Group | I; II; III | |
| USCG CHRIS Code | OXA | |