Product Identification

Product Name

DHA

Synonyms

3-Acetyl-4-hydroxy-6-methyl-2h-pyran-2-one
3-Acetyl-6-methyl-2,4-pyrandione
3-Acetyl-6-methyl-2H-pyran-2,4(3H)-dione
3-Acetyl-6-methylpyran-2,4-dione
3-Acetyl-6-methylpyrandione-2,4
Dehydracetic acid

CAS

520-45-6

Formula

C8H8O4

Molecular Weight

168.15

EINECS

208-293-9

RTECS

UP8050000

RTECS Class

Agricultural Chemical and Pesticide; Tumorigen

Merck

13,2885

Beilstein/Gmelin

6129

Beilstein Reference

4-17-00-06699

EC Index Number

607-163-00-2

EC Class

Harmful

Physical and Chemical Properties

Appearance

Needles from water, rhombic needles or prisms from alcohol. Odorless.

Solubility in water

Very soluble

Melting Point

108

Boiling Point

333

Vapor Pressure

0.0001 (25 C)

pKa/pKb

5.39 (pKa)

Partition Coefficient

.35

Heat Of Vaporization

61.3 kJ/mol

Usage

Organic synthesis, as plasticizer, bactericide, fungicide, in antienzyme toothpastes, to reduce pickle bloating.

Vapor Density

5.8

Refractive Index

1.4379 (20 C)

First Aid Measures

Ingestion

The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.

Inhalation

Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.

Skin

Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush with running water for at least 20 minutes. Wash skin with soap and water.

Eyes

Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Handling and Storage

Storage

Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Skin

May cause burns.

Eyes

See Skin.

EC Risk Phrase

R 22

UN (DOT)

1325

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Exposure Effects

The toxological properties of this substance have not been fully investigated.

Poison Class

4

Fire Fighting Measures

Flash Point

151

Fire Fighting

Water or foam may cause frothing.

Fire Potential

Slight fire hazard.

Accidental Release Measures

Small spills/leaks

Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. With clean shovel place material into clean, dry container and cover loosely; move containers from spill area.

Stability and Reactivity

Disposal Code

4

Stability

Moderately volatile in steam.

Combustion Products

Fire may produce irritating and/or toxic gases.

Transport Information

UN Number

1325

Hazard Class

4.1

Packing Group

II; III

HS Code

2932 29 80