Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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Acetylenedicarboxylic acid dimethyl ester(762-42-5)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
Acetylenedicarboxylic acid dimethyl ester
Synonyms
1,2-Bis(methoxycarbonyl)ethyne
2-Butynedioic acid, dimethyl ester
Acetylenedicarboxylic acid, dimethyl ester
Bis(carbomethoxy)acetylene
Dimethyl 1,2-acetylenedicarboxylate
Dimethyl ethynedicarboxylate
CAS
762-42-5
Formula
C6H6O4
Molecular Weight
142.11000000000001
EINECS
212-098-4
RTECS
ES0175000
RTECS Class
Agricultural Chemical and Pesticide
Beilstein/Gmelin
607063
Beilstein Reference
4-02-00-02291
EC Class
corrosive

Physical and Chemical Properties

Appearance
Clear slightly yellow liquid.
Solubility in water
Slightly soluble
Melting Point
-18
Boiling Point
204
Vapor Pressure
0.3 (25 C)
Density
1.1532 g/cm3 (20 C)
Partition Coefficient
1.5
Heat Of Vaporization
44.1 kJ/mol
Refractive Index
1.4439 (20 C)

First Aid Measures

Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or 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. DO NOT use mouth-to-mouth respiration.
Skin
Get medical aid 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
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage
Keep away from heat, sparks, and flame. Store in a cool, dry place. Store in a tightly closed container. Corrosives area.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Do not ingest or inhale. Discard contaminated shoes. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.

Hazards Identification

Inhalation
May cause cyanosis, characterized by bluish-colored skin. Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
Skin
Causes skin burns.
Eyes
Causes eye burns. Lachrymator.
Ingestion
Causes gastrointestinal tract burns. May cause methemoglobinemia, cyanosis, convulsions, and death.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
EC Risk Phrase
R 21/22 34 36
EC Safety Phrase
S 26 36/37/39 45
UN (DOT)
2810

Exposure Controls/Personal Protection

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 protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions. 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.
Exposure Effects
Chronic inhalation and ingestion may cause effects similar to those of acute inhalation and ingestion.
Poison Class
3

Fire Fighting Measures

Flash Point
86
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. Combustible Liquid. Containers may explode if exposed to fire. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use agent most appropriate to extinguish fire. Cool containers with flooding quantities of water until well after fire is out.
Fire Potential
Combustible material: may burn but does not ignite readily.

Accidental Release Measures

Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Provide ventilation.

Stability and Reactivity

Disposal Code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong acids, strong bases, and strong reducing agents. Explosive reaction with 1-methylsilacyclopenta-2,4-diene at 150 C. Octakis(trifluorophosphine)dirhodium catalyzes explosive polymerization of the acid above 20 C.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
Combustion Products
Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number
2810
Hazard Class
6.1
Packing Group
I; II; III
HS Code
2917 19 90
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