Methyl acetate
- Acetic acid, methyl ester
- Methyl ethanoate
- Methyl acetic ester
Methyl acetate | |
| |
| Formula | CH3COOCH3 |
| Structure | |
| Description | Colorless, volatile liquid, pleasant, fruity odor. |
| Uses | Solvent for nitrocellulose, acetylcellulose, resins & oils, manufacture artificial leather. |
| Registry Numbers and Inventories. | |
| CAS | 79-20-9 |
| EC (EINECS/ELINCS) | 201-185-2 |
| EC Index Number | 607-021-00-X |
| EC Class | Highly flammable; Irritant; Repeated exposure may cause skin dryness or cracking; Vapours may cause drowsiness and dizziness |
| EC Risk Phrase | R 11 36 66 67 |
| EC Safety Phrase | S 16 26 29 33 |
| RTECS | AI9100000 |
| RTECS class | Mutagen; Human Data; Primary Irritant |
| UN (DOT) | 1231 |
| Merck | 12,6089 |
| Beilstein/Gmelin | 1736662 |
| Beilstein Reference | 4-02-00-00122 |
| Swiss Giftliste 1 | G-2418 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | C3H6O2 |
| Formula mass | 74.08 |
| Melting point, °C | -98 |
| Boiling point, °C | 56.9 |
| Vapor pressure, mmHg | 171 (20 C) |
| Vapor density (air=1) | 2.6 |
| Saturation Concentration | 22.77% at 20 C |
| Evaporization number | 2.2 (diethyl ether = 1) |
| Critical temperature | 233.7 |
| Critical pressure | 45.3 |
| Density | 0.938 g/cm3 (20 C) |
| Solubility in water | 320 g/L (20 C) |
| Viscosity | 0.385 cp (20 C) |
| Surface tension | 24.8 g/s2 (20 C) |
| Refractive index | 1.3614 (20 C) |
| Dipole moment | 1.706 D |
| Dielectric constant | 6.6 (25 C) |
| Partition coefficient, pKow | 0.18 |
| Heat of vaporization | 32.5 kJ/mol |
| Heat of combustion | -1672 kJ/mol |
| Hazards and Protection. | |
| Storage | Keep away from sources of ignition. Store in a cool, dry, well-ventilated area away from incompatible substances. |
| WHMIS | B2 D2B |
| Handling | Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Ground and bond containers when transferring material. Avoid contact with skin and eyes. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid ingestion and inhalation. Do not allow contact with water. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. |
| 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 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 | Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. |
| Disposal code | 1 |
| Stability | Stable at room temperature in sealed containers under normal storage and handling conditions. |
| Incompatibilities | Nitrates, strong oxidizers, alkalis, and acids. Reacts slowly with water to form acetic acid and methanol. |
| Decomposition | Carbon monoxide, carbon dioxide. |
| Fire. | ||||
| Flash Point,°C | -13 | |||
| Autoignition, °C | 455 | |||
| Upper exp. limit, % | 16 .0 | |||
| Lower exp. limit, % | 3.1 | |||
| Fire fighting | Wear full protective clothing and NIOSH-approved self-contained breathing apparatus with full facepiece operated in the pressure demand or other positive pressure mode. Extinguish using dry chemical, alcohol foam or carbon dioxide. Water may be ineffective. Water spray may be used to keep fire exposed containers cool. Water may be used to flush spills away from exposures and to dilute spills to non-flammable mixtures. | |||
| Fire potential | Flammable liquid and vapor. | |||
| Hazards | Vapor is heavier than air and may travel a considerable distance to a source of ignition and flash back. | |||
| Combustion products | Fire may produce irritating, corrosive and/or toxic gases. | |||
| NFPA | Health | 1 | ||
| Flammability | 3 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | OSHA PEL: TWA 200 ppm (610 mg/m3) NIOSH REL: TWA 200 ppm (610 mg/m3) ST 250 ppm (760 mg/m3) NIOSH IDLH: 3100 ppm LEL |
| Poison_Class | 3 |
| Exposure effects | Repeated contact with the liquid may cause dryness, cracking, and skin irritation. Causes eye irritation. Affects the central nervous system. Chronic effects may be similar to those from methanol exposure because methyl acetate can be hydrolyzed yielding methanol and acetic acid. Optic nerve damage is the predominant hazard. |
| Ingestion | May produce abdominal pain, nausea. Aspiration into lungs can produce severe lung damage and is a medical emergency. Other symptoms expected to parallel inhalation. |
| Inhalation | Inhalation of vapors causes irritation to the eyes, nose, and respiratory tract. Vapors have a narcotic effect, producing symptoms of dizziness, depression, shortness of breath, and irregular heartbeat. High concentrations can cause CNS depression characterized by eye inflammation, nervous irritation, chest tightness, headache, dizziness, drowsiness, difficulty breathing, palpitation, and conjunctivitis. |
| Skin | Causes loss of natural oils and skin irritation. |
| Eyes | Vapors can cause irritation with redness, tearing, and pain. A severe irritant to the eyes from liquid splashes. |
First aid |
|
| Ingestion | Aspiration hazard. If swallowed, vomiting may occur spontaneously, but DO NOT INDUCE. If vomiting occurs, keep head below hips to prevent aspiration into lungs. Never give anything by mouth to an unconscious person. Call a physician immediately. |
| Inhalation | Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. |
| Skin | 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. |
| 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 | 1231 | |
| Response guide | 129 | |
| Hazard class | 3 | |
| Packing Group | II | |
| USCG CHRIS Code | MTT | |
| USCG Compatatibility Group | 34 Esters | |
| HS Code | 2915 39 30 | |
| Std. Transport # | 4908220 | |
| IMO Chemical Code | 18 | |
| IMO Pollution Category | III | |