Dehydroacetic acid
1.
Basic Information
CAS: |
520-45-6 |
EINECS: |
208-293-9 |
Molecular Formula: |
C8H8O4 |
Molecular Weight: |
168.15 |
Structural Formula: |
|
Synonyms: |
Dehydranone; |
2.
Technical Specification
TEST ITEM |
SPECIFICATION |
Item |
Specification |
Appearance |
White or
light yellow powder |
Assay (
on dry basis) ,% |
98.0-100.5 |
Melting
point, ℃ |
109.0-111.0 |
Loss on
Drying,% |
≤1.0 |
Ignition
residue, % |
≤0.1 |
Heavy
metals Pb
(mg/kg) |
≤0.5 |
3.
Solubility
Dehydroacetic
acid is hard to dissolve in water, soluble in benzene, ether, acetone and hot
ethanol.
4.
Packing
Standard
packaging:25kg/drum Available special
request
5.
Storage
Store in a well-ventilated, cool, dry area, out of direct
sunlight. Keep containers tightly closed when not in use.
6.
Period of validity
24 months
7.
Application
Dehydroacetic acid is a low
toxicity, high efficiency, broad spectrum antimicrobial agent. Used as preservatives
and anti-mould agent in paint, oil, leather products, food, feed, packaging
materials and cosmetics. The maximum allowable amount (mass fraction) is 0.6%
(acid), and the general use content (mass fraction) is 0.02% to 0.2%.
Dehydroacetic acid is used as an intermediate in
organic synthesis; it is also used as a paste for resin emulsions such as vinyl
acetate emulsion and acrylic vinyl emulsion, and also used as a paste for
mixtures of polyvinyl alcohol, carboxymethyl cellulose, starch, bone glue, etc.;
more recently
Dehydroacetic acid is used in adhesives, mosquito
coils, feed, shampoo, toothpaste and other fields; because this product has an
inhibitory effect on molds, yeasts, and gram bacilli, it is used as an
antifungal agent and preservative in medicine, cosmetics and food. In China it
can be used for fermented bean curd, assorted pickles, and orange juice.
DHA can promote the growth of brain cells, improve
brain functions, nourish the brain, prevent Alzheimer's, and promote the
development of infants and young children's retina. However, in the application
of prevention and treatment of cardiovascular diseases, side effects such as
gastrointestinal discomfort, pulmonary embolism, skin reactions and
agranulocytosis may occur.
Dehydroacetic acid is a broad-spectrum feed
preservative that can inhibit the growth of mold, yeast and bacteria. The
antibacterial effect is basically not affected by PH, but the antiseptic effect
is best under neutral conditions.
Dehydroacetic acid is an organic synthesis
intermediate, toughening agent, and a broad-spectrum food preservative. As a
food additive, dehydroacetic acid is allowed to be used in cheese, butter,
margarine, soft drinks, fermented milk and lactic acid bacteria drinks, bean
paste, fillings, etc. As a food additive, sodium dehydroacetate is generally
used.
Dehydroacetic acid is also used in daily cosmetics,
fiber products, medicine (such as the treatment of ringworm), and the
antiseptic of dental materials.