Butylated hydroxytoluene
- BHT
- 2,6-Di-tert-butyl-4-methylphenol
- 2,6-di-tert-Butyl-p-cresol
Butylated hydroxytoluene | |
| |
| Formula | 2,6-[(CH3)3C]2-4-(CH3)C6H2OH |
| Structure | |
| Description | White to pale yellow crystalline solid, slight phenolic odor. |
| Uses | antioxidant |
| Registry Numbers and Inventories. | |
| CAS | 128-37-0 |
| EC (EINECS/ELINCS) | 204-881-4 |
| EC Class | dangerous for the environment |
| EC Risk Phrase | R 22 36/38 |
| EC Safety Phrase | S 26 36/37/39 |
| RTECS | GO7875000 |
| RTECS class | Tumorigen; Mutagen; Reproductive Effector; Human Data; Primary Irritant |
| UN (DOT) | 3077 |
| Merck | 13,1547 |
| Beilstein/Gmelin | 1911640 |
| Beilstein Reference | 4-06-00-03511 |
| EPA OPP | 22105 |
| Swiss Giftliste 1 | G-2202 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | C15H24O |
| Formula mass | 220.36 |
| Melting point, °C | 69 - 70 |
| Boiling point, °C | 265 |
| Vapor pressure, mmHg | 0.006 (25 C) |
| Vapor density (air=1) | 7.6 |
| Saturation Concentration | 13 ppm (0.001%) at 20 C (calculated) |
| Density | 1.069 g/cm3 (19.85 C) |
| Solubility in water | 0.6 mg/L |
| Viscosity | 3.47 centistokes at 0C |
| Refractive index | 1.4859 (75 C) |
| pKa/pKb | 12.75 (pKa) |
| Partition coefficient, pKow | 5.32 |
| Heat of fusion | 19.87 kJ/mol |
| Heat of vaporization | 52.2 kJ/mol |
| Hazards and Protection. | |
| Storage | Store in a cool, dry place. Do not store in direct sunlight. Keep container closed when not in use. |
| Handling | Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with skin and eyes. Avoid ingestion and inhalation. |
| 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 | Vacuum or sweep up material and place into a suitable disposal container. Reduce airborne dust and prevent scattering by moistening with water. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation. |
| Disposal code | 3 |
| Stability | Stable under normal temperatures and pressures. |
| Incompatibilities | Acid chlorides, acid anhydrides, oxidizing agents, bases, steel (corrodes it), brass, copper, copper alloys, and direct sunlight. |
| Decomposition | Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide. |
| Fire. | ||||
| Flash Point,°C | 118 | |||
| Autoignition, °C | 345 | |||
| Upper exp. limit, % | 4.9 | |||
| Lower exp. limit, % | 0.5 | |||
| 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. Extinguishing media: Water spray may cause frothing. Use dry chemical or carbon dioxide. | |||
| Fire potential | This chemical is combustible. | |||
| NFPA | Health | 2 | ||
| Flammability | 1 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | TLV: ppm; 10 mg/m3 (ACGIH 1992-1993). NIOSH REL: TWA 10 mg/m3 |
| Poison_Class | 4 |
| Exposure effects | May cause reproductive and fetal effects. |
| Ingestion | Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed. |
| Inhalation | Causes respiratory tract irritation. |
| Skin | Causes skin irritation. |
| Eyes | Causes eye irritation. |
First aid |
|
| Ingestion | 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. |
| Inhalation | Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. |
| Skin | Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. 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. |
| Transport. | ||
| UN number | 3077 | |
| Response guide | 171 | |
| HS Code | 2907 19 00 | |