Product Identification

Product Name

MAA

Synonyms

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

CAS

105-45-3

CAS

7782-91-4

Formula

C5H8O3

Formula

H2MoO4

Molecular Weight

116.12

Molecular Weight

161.94999999999999

EINECS

203-299-8

EINECS

231-970-5

RTECS

AK5775000

RTECS Class

Primary Irritant

Merck

12,6090

Merck

12,6322

Beilstein/Gmelin

105453 (G)

Beilstein/Gmelin

506727

Beilstein Reference

4-03-00-01527

EC Index Number

607-137-00-0

EC Class

Irritant

Physical and Chemical Properties

Appearance

Colorless liquid.

Appearance

White powder

Solubility in water

Soluble

Melting Point

300

Melting Point

-39

Boiling Point

170

Vapor Pressure

0.7 (20 C)

Density

1.076 g/cm3 (20 C)

Density

3.1 g/cm3 (20 C)

pKa/pKb

10.67 (pKa)

Partition Coefficient

-.264

Heat Of Vaporization

Heat Of Combustion

-2486 kJ/mol

Usage

Solvent for cellulose ethers, component of solvent mixtures for cellulose esters, chemical intermediate for organic compounds.

Vapor Density

N/R

Vapor Density

4

Saturation Concentration

900 ppm; 1700 ppm at 20 C (calculated)

Odor threshold

.

Refractive Index

1.418 (20 C)

First Aid Measures

Ingestion

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

Ingestion

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

Inhalation

May cause respiratory tract irritation.

Inhalation

Remove from exposure to fresh air 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

May cause skin irritation.

Skin

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

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

May cause eye irritation.

Eyes

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

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

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

Handling

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

Hazards Identification

Ingestion

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

Ingestion

Nausea, vomiting and diarrhea are possible if ingested.

Inhalation

Cough, tachypnea, and wheezing are common after inhalation.

Skin

Redness, swelling and pain may occur.

Eyes

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 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 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.

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.

Respirators

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

4

Fire Fighting Measures

Flash Point

67

Autoignition

350

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

11

Lower exp. limit

1.3

Fire Potential

Moderate fire hazard, when exposed to heat, flame or oxidizers.

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.

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal.

Stability and Reactivity

Disposal Code

1

Incompatibilities

Oxidizing agents - bases.

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong bases, strong oxidizing agents.

Decomposition

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

Decomposition

Irritating and toxic fumes and gases.

Transport Information

HS Code

2918 30 00