trans-Crotonaldehyde
- (E)-2-Butenal
- trans-2-Butenal
- Crotenaldehyde
- Crotonaldehyde
- beta-Methylacrolein
trans-Crotonaldehyde | |
| |
| Formula | C4H6O |
| Structure | |
| Description | Water-white, mobile liquid. Pungent, suffocating odor. |
| Uses | Chemical intermediate for n-butyl alcohol, quinaldine, crotonic acid, surface-active agents, textile & paper sizes, insecticides & flavoring agents, fuel-gas warning agent, solvent for polyvinyl chloride, alcohol denaturant, leather tanning agent. |
| Registry Numbers and Inventories. | |
| CAS | 123-73-9 |
| EC (EINECS/ELINCS) | 204-647-1 |
| EC Index Number | 605-009-00-9 |
| EC Class | Highly flammable; Mutagenic Category 3; Very toxic; Toxic; Harmful; Irritant; Dangerous for the Environment |
| EC Risk Phrase | R 11 24/25 26 37/38 41 48/22 50 68 |
| EC Safety Phrase | S 26 28 36/37/39 45 61 |
| RTECS | GP9625000 |
| RTECS class | Mutagen; Human Data; Primary Irritant |
| UN (DOT) | 1143 |
| Merck | 13,2624 |
| Beilstein/Gmelin | 906731 |
| Beilstein Reference | 3-01-00-02968 |
| RCRA | U053 |
| Swiss Giftliste 1 | G-1441 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Properties. | |
| Formula | C4H6O |
| Formula mass | 70.10 |
| Melting point, °C | -73.9 |
| Boiling point, °C | 102 |
| Vapor pressure, mmHg | 38 (20 C) |
| Vapor density (air=1) | 2.41 |
| Density | 0.853 g/cm3 (20 C) |
| Solubility in water | more than 50 g/100 ml |
| Refractive index | 1.4366 (20 C) |
| Heat of vaporization | 38.9 kJ/mol |
| Heat of combustion | -2268 kJ/mol |
| Hazards and Protection. | |
| Storage | Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Keep under a nitrogen blanket. Flammables-area. |
| Handling | Use spark-proof tools and explosion proof equipment. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Take precautionary measures against static discharges. Use only in a chemical fume hood. Store and handle protected from air. |
| Protection | 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 | Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. Use a spark-proof tool. |
| Stability | Stable under normal temperatures and pressures. |
| Incompatibilities | Oxidizing agents, reducing agents, bases, acids (mineral, non-oxidizing, e.g. hydrochloric acid, hydrofluoric acid, muriatic acid, phosphoric acid), acids (mineral, oxidizing, e.g. chromic acid, hypochlorous acid, nitric acid, sulfuric acid), caustics (e.g. ammonia, ammonium hydrozide, calcium hydroxide, potassium hydroxide, sodium hydroxide). |
| Decomposition | Carbon monoxide, carbon dioxide. |
| Fire. | ||||
| Flash Point,°C | 13 | |||
| Autoignition, °C | 232 | |||
| Upper exp. limit, % | 15.5 | |||
| Lower exp. limit, % | 2.1 | |||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide. | |||
| Fire potential | Fire hazard when exposed to heat or flame; can react with oxidizing materials. | |||
| Hazards | Vapors form explosive mixtures in air or in sewers. Hazardous peroxides and acids emitted when heated to decomposition. Avoid nitric acid. Unstable, avoid oxygen, heat, elevated pressures. Hazardous polymerization may occur. Avoid contact with alkaline materials such as caustic ammonia or amines, or at elevated temperatures. | |||
| Combustion products | Fire will produce irritating, corrosive and/or toxic gases. | |||
| NFPA | Health | 4 | ||
| Flammability | 3 | |||
| Reactivity | 2 | |||
| Health. | |
| Poison_Class | 2 |
| Exposure effects | Seizures have been observed as a terminal event in exposed rats. Chronically exposed Russian workers developed unspecified sexual disturbances, decreased androgenous function of the male endocrine glands, and menstrual disturbances. |
| Ingestion | Harmful if swallowed. |
| Inhalation | Causes respiratory tract irritation. May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. Toxic if inhaled. |
| Skin | Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. Substance is rapidly absorbed through the skin. Causes redness and pain. |
| Eyes | Causes eye irritation. Contact with liquid or vapor causes severe burns and possible irreversible eye damage. Lachrymator. Causes redness and pain. Lachrymator. |
First aid | |
| Ingestion | Induce vomiting. Get medical aid immediately. Wash mouth out with water. |
| Inhalation | Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. |
| 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. |
| 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 | 1143 |  |
| Response guide | 131 | |
| Hazard class | 6.1 | |
| Packing Group | I | |
| USCG Compatatibility Group | 19. Aldehydes | |