Canadian gum / Canadian balsam / Canadian resin / fir gum / Canadian fir gum / optical resin gum

English Name: Canada balsam; Balsam Canada

Other names: Canadian resin; Fir gum; Canadian fir balm;  Optical resin glue; Canadian gum; Canadian turpentine

CAS No.: 8007-47-4

Grade: br

Relative density: 0.987 ~ 0.994

Refractive index (n20d):1.52 ~ 1.54

Attention should be paid to the following when using and storing Canadian gum:

1. Do not heat, otherwise the gum will turn dark brown immediately, which will affect the observation after sealing

2. Gum should be stored in brown bottles and kept away from light

3. The glass bottle mouth should be sealed to prevent evaporation and solidification

4. In order to prevent the gum from turning sour, add a few small pieces of marble cleaned with xylene into the gum to neutralize the acidity

Physicochemical properties: light yellow to slightly green, viscous, transparent, slightly fluorescent liquid. It has a pleasant aroma. It tastes bitter. Non crystalline substances that gradually become solid in exposed air. It can be miscible with benzene, chloroform, xylene, ethyl acetate and cedar oil. Soluble in ethanol, ether, turpentine and petroleum ether, insoluble in water.

Purpose: biochemical research.

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