Gum rosin 
1)Natural rosin made of pine trees 
2)Softening point: 76.1, acid number: 169.5 
3)Good quality with competitive price 
4)CAS No.: 8050-09-7 
5)ISO9001 manufacturer in China 

Gum Rosin 
Synonyms: Colophony, Rosin 
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. 

Application: 
Chemical material for Paper Production, Soap, Ink, Paints, Adhesives, Ruber, Synthetic Resin, Electric Insulation material, and Organic Synthesis 

Packing: 25 kgs in kraft paper bags or 225 kgs in drums, 20/18MT/20'container

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