1. Basic Product Information

Chemical Name Tris[2‑[2‑(2‑methoxyethoxy)ethoxy]ethyl] orthoborate

Synonyms MTGB, Triethylene glycol methyl ether borate, Boric acid tris (triethylene glycol monomethyl ether) ester

CAS Number 30989‑05‑0

Molecular Formula C₂₁H₄₅BO₁₂

Molecular Weight 500.39 g/mol

HS‑Code 2915390090

2. Chem‑Physical Properties

Appearance Colorless clear transparent liquid

Odor Mild ether‑like odor

Density (20 °C) 1.050‑1.060 g/cm³

Flash point (closed cup) ≥250 °C

Equilibrium reflux boiling point ≥290 °C

Boiling point(predicted) 493 °C @760 mmHg

Freezing point <‑40 °C

Solubility in water Miscible with water

Solubility Miscible with alcohols, glycol ethers; compatible with polyglycol base fluids

Stability Hydrolyzes slowly in humid environment; avoid prolonged contact with free‑water, strong acids

4. Application & Use

- Key raw material for high‑performance automotive brake fluid (DOT3 / DOT4)：raises equilibrium reflux boiling point, suppresses vapor lock risk, improves high‑temperature performance of brake fluid。

- Boron‑containing intermediate for synthesis of fine chemicals.

- Used in polyglycol‑based functional fluid formulations.

Note: Product is sensitive to water; excessive moisture will cause hydrolysis and degrade brake‑fluid performance.

5. Packing

Standard packing: 200 kg net HDPE plastic drum

Small lab package: 25 kg plastic drum

6. Storage & Transportation

Storage

Store in cool, dry, well‑ventilated warehouse, temperature 10‑30 °C. Keep container tightly closed.

Strictly prevent moisture ingress (hydrolysis risk); keep away from strong acids.

Shelf‑life: 12 months under recommended storage.

Transportation

Non‑dangerous goods for international transport

Proper Shipping Name: Tris[2‑[2‑(2‑methoxyethoxy)ethoxy]ethyl] orthoborate