Ethylene Sulfite

Ethylene Sulfite (ES)

English Name: Glycol sulfite, also known as Ethylene sulfite

Product Name: Ethylene sulfite; Glycol sulfite; Ethylene glycol sulfite

Molecular Formula: C2H4O3S

Molecular Weight: 108.11

CAS Number: 3741-38-6

EINECS Number: 223-131-7

Physical and Chemical Properties:

Density: 1.426

Boiling Point: 172-174 °C

Refractive Index: 1.445-1.447

Flash Point: 79 °C

Safety Instructions: S24/25 - Avoid contact with skin and eyes.

Abbreviation: ES

Appearance: Colorless liquid

Purity: ≥99.9%

Chloroethanol: ≤0.01%

Packaging Material: PE

Packaging Weight: 1kg/20kg

Uses: As an organic solvent and additive for lithium-ion battery electrolytes. Adding ES provides excellent storage stability, improves low-temperature performance, and prevents PC molecules from intercalating into graphite electrodes. Also used in organic synthesis and pharmaceutical intermediates.