ChemicalBook >>Methyl acetoacetate>>MAA(105-45-3)


Product IdentificationBack to Contents
【Product Name】


3-Oxobutanoic acid, methyl-
Dihydrogen tetraoxomolybdate(2-)
Methyl 3-oxobutanoate
Methyl acetylacetate
Molybdenum(VI) acid monohydrate
Molybdic acid monohydrate




【Molecular Weight】

【Molecular Weight】




【RTECS Class】

Primary Irritant



105453 (G)

【Beilstein Reference】

【EC Index Number】

【EC Class】

Physical and Chemical PropertiesBack to Contents

Colorless liquid.

White powder
【Solubility in water】

【Melting Point】

【Melting Point】

【Boiling Point】

【Vapor Pressure】

0.7 (20 C)

1.076 g/cm3 (20 C)

3.1 g/cm3 (20 C)

10.67 (pKa)
【Partition Coefficient】

【Heat Of Vaporization】

【Heat Of Combustion】

-2486 kJ/mol

Solvent for cellulose ethers, component of solvent mixtures for cellulose esters, chemical intermediate for organic compounds.
【Vapor Density】

【Vapor Density】

【Saturation Concentration】

900 ppm; 1700 ppm at 20 C (calculated)
【Odor threshold】

【Refractive Index】

1.418 (20 C)
First Aid MeasuresBack to Contents

Do NOT induce vomiting. Allow the victim to rinse his mouth and then to drink 2-4 cupfuls of water, and seek medical advice.

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.

May cause respiratory tract irritation.

Remove from exposure to fresh air immediately.

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

May cause skin irritation.

Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

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.

May cause eye irritation.

Flush eyes with copious amounts of water for at least 15 minutes.

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 StorageBack to Contents

Store in a cool, dry place. Keep container closed when not in use.

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Hazards IdentificationBack to Contents

Ingestion of large amounts may cause gastrointestinal irritation. The toxicological properties of this substance have not been fully investigated.

Nausea, vomiting and diarrhea are possible if ingested.

Cough, tachypnea, and wheezing are common after inhalation.

Redness, swelling and pain may occur.

Irritants may cause swelling, redness and pain at any site, especially at mucous membranes. The mouth, nose, and eyes are susceptible to these effects.
【EC Risk Phrase】

R 36
【EC Safety Phrase】

S 26
Exposure Controls/Personal ProtectionBack to Contents
【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 and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
【Personal Protection】

Wear appropriate chemical protective gloves, boots and goggles.

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.

Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
【Poison Class】

Fire Fighting MeasuresBack to Contents
【Flash Point】


【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: Use agent most appropriate to extinguish fire.
【Fire Fighting】

Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use alcohol foam, dry chemical or carbon dioxide.
【Upper exp. limit】

【Lower exp. limit】

【Fire Potential】

Moderate fire hazard, when exposed to heat, flame or oxidizers.
Accidental Release MeasuresBack to Contents
【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.
【Small spills/leaks】

Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal.
Stability and ReactivityBack to Contents
【Disposal Code】


Oxidizing agents - bases.

Stable under normal temperatures and pressures.

Strong bases, strong oxidizing agents.

Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Irritating and toxic fumes and gases.
Transport InformationBack to Contents
【HS Code】

2918 30 00
Company Name:Nanjing Zhipu Chemical Co., Ltd
Company Name:J & K SCIENTIFIC LTD.
Tel:400-666-7788 +86-10-82848833
Company Name:Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel:+86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
Fax:+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing)
Company Name:Alfa Aesar
Tel:400-610-6006; 021-67582000
Company Name:TCI (Shanghai) Development Co., Ltd.
Company Name:Beijing dtftchem Technology Co., Ltd.
Tel:13651141086; 86(10)60275028、60275820
Fax:86 (10) 60270825
Company Name:BeiJing Hwrk Chemicals Limted
Company Name:Energy Chemical
Tel:021-58432009 / 400-005-6266