Gum rosin 
 Gum rosin (HS CODE: 3806 1000 CAS NO: 8050-09-7) 
 Indicators super X a WW two WG three four M five K 
 Color yellowish pale yellow yellow deep yellow brownish yellow red 
 The appearance of transparent 
 The softening point t (R. & B.) 76 ° C min, 75 ° C min, 74 ° C min 
 Acid value mg KOH / g, 166 min, 165 min, 164 min 
 Unsaponifiable matter content of 5% max 5% max 5% max 
 Ethanol insoluble matter 0.03% max 0.03% max 0.04% max 
 Ash content 0.02% max 0.03% max 0.04% max 
 Rosin is a natural organic matter, mainly composed by a variety of resin acids, soluble in many organic solvents, with special chemical activity. Therefore, it is an important raw material for soap, paper, paint, rubber, resins, electrical appliances, organic synthesis industry. 
 Galvanized iron drum, barrel of rosin 225/230 kg net weight, pay attention to fire heat-resistant storage. 
 The rosin general physical characteristics 
 Appearance of the yellow brittle solid 
 Color light yellow to red 
 Do not dissolve in water, but soluble in organic solvents 
 Softening point 72-80 ℃ 
 The relative density of 1.070-1.085 
 The average heat capacity (20-245 ° C) 0.54 kcal / (kg. ℃) 
 Melting rosin expansion coefficient of 0.00055 
 Heat of fusion 15.8kcal/kg 
 Calorific value 9074-9171kcal/kg 
 Boiling point of 250 ° C / 5 mmHg in 
 Thermal conductivity of 0.11 kcal / (mh ° C) 
 Mist dust ignition 130 ° C 
 Flash point of 216 ° C 
 Lower explosive limit 12.6g/m3