Sodium diacetate

CAS Number
126-96-5
EC Number
204-814-9
E Number
E262(ii)
FEMA Number
FEMA 3900
Industries: Food & Nutrition

What is Sodium diacetate?

Sodium diacetate (CAS 126-96-5), also designated E262ii, is a compound of sodium acetate and acetic acid used commercially as a preservative, acidulant, and flavoring agent.

Where is Sodium diacetate used?

  • Food manufacturing: extends shelf life in baked goods
  • Meat products and snack seasonings: inhibits mold and bacterial growth while contributing a mild vinegar flavor
  • Snack foods: dry seasoning component on chips
  • Crackers: replicates salt-and-vinegar taste profiles with consistent dosing
  • Processed and packaged foods: pH buffer that stabilizes acidic conditions where liquid acidulants are impractical
  • Personal care: buffering agent and mild preservative booster in products requiring controlled acidity
  • It delivers controlled acetic acid activity in solid form, giving formulators the functional profile of vinegar without handling liquid acid.

Commercial specifications

  • Food-grade material conforming to FCC and E262ii specifications

Other Names (Synonyms)

E262ii|Acetic acid, sodium salt (2:1)|Sodium hydrogen diacetate|Sodium acid acetate|Dykon|Acid acetate|Sodium acetate, acid|Sodium hydrogen acetate

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What are the physical properties of Sodium diacetate?

Melting Point 323-329 °C(lit.)
Density 1.0184 g/cm³ (solid)
Flash Point 40°C (104°F)
Appearance White crystals; acetic acid odor. Decom- poses above 150C. Soluble in water; slightly soluble in alcohol; insoluble in ether. Combustible.
Color Clear colorless
Odor Bland
Form solid
Water Solubility soluble H2O [MER06]; slightly soluble alcohol; insoluble ether [HAW93]
Vapor Pressure 0Pa at 25℃
pH 7.0±0.05 (25℃)
Log P -3.72

How is Sodium diacetate classified and handled safely? Learn More

Danger
GHS05· Corrosive

Hazard Statements

H318 Causes serious eye damage

Precautionary Statements

P280 Wear protective gloves/protective clothing/eye protection/face protection.
P317 Get emergency medical help.
P264+P265 Wash … thoroughly after handling.
P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Which trade and regulatory codes apply to Sodium diacetate?

HS Code 29152910
UN Number 2790
ADR Class 8
Packing Group II
Storage Class 10 - Combustible liquids
WGK (Germany) 1
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