Table III: Typical properties of selected commercially available grades of polyoxyethylene alkyl ethers.

Name Physical form Acid value

HLB

value

Hydroxyl value

Iodine number

Saponification value

Density (g/cm3) at 208C unless otherwise stated

Water content (%)

Boiling point (8C)

Melting point or pour point (8C)

Cloud point (8C) for

1% aqueous solution

pH aqueous solution

Brij 30 Colorless to pale yellow liquid

42 9.7 145–165  — — ≈0.95 at 258C 41.0 >100 ≈2 — —

Brij 35 White waxy solid 45 16.9 40–60 — — ≈1.05 at 258C 43.0 >100 ≈33 — —

Brij 52 White waxy solid 41 5.3 160–180  — — ≈0.95 41.0 — 33 — 5–8 (10% in 1 : 1

IPA: water)

Brij 56 White waxy solid 41 12.9 75–90 — — ≈1.06 at 258C 43.0 — 31 — —

Brij 58 White solid 41 15.7 45–60 — — 1.02 at 258C 43.0 — 38 — —

Brij 72 White waxy solid 41 4.9 150–170  — — ≈0.97 at 258C 41.0 — 43 — —

Brij 76 White waxy solid 41 12.4 75–90 — — ≈1.05 at 258C 43.0 >100 38 — 5–8 (10% in 1 : 1

IPA : water)

Brij 78 White solid pellets 41 15.3 45–60 — — ≈1.09 at 258C 43.0 — 38 — 5–8 (10% in 1 : 4

IPA : water)

Brij 721 White to ivory solid pellets or flakes

<2 15.5 44–61 — — ≈1.0 at 258C 42.0 — 45 — —

Brij 93Veg Pale yellow liquid 41 4.9 160–180  — — ≈0.9 at 258C 41.0 >100 10 — 5–8 (10% in 1 : 1

I