Appearance: Light Yellow
Synonyms: Colophony; Pine rosin
CAS No.: 8050-09-7
Gum rosin is made of natural resin, its general formula is C20H30O2
Gum rosin is made of natural resin, its general formula is C20H30O2.
Gum rosin also called colophony, is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene components. It is semi-transparent and varies in color from yellow to black. At room temperature rosin is brittle, but it melts at stove-top temperatures. It chiefly consists of different resin acids, especially abietic acid.
Gum rosin is an important raw material for the manufacture of adhesive, coating, inks, rubber, soaps, paper etc.
Parameter | Grade | ||
Standard: GB/T8145-8146-2003 | X | WW | WG |
APPEARANCE | Transparent | Transparent | Transparent |
COLOR | Light Yellow | Pale Yellow | Yellow |
SOFTENING POINT(R&B)°C | 76.0 | 76.0 | 75.0 |
ACID NUMBER(mg KOH / g)≥ | 166.0 | 166.0 | 165.0 |
UNSAPONIFIABLE MATTER % ≤ | 5.0 | 5.0 | 5.0 |
ETHANOL INSOLUBLES % ≤ | 0.030 | 0.030 | 0.030 |
ASH CONTENT % ≤ | 0.020 | 0.020 | 0.030 |
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