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
Home > DHA > DHA(520-45-6)

DHA(520-45-6)

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
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
Contact More