27 CFR §21.106-T
- (a)Specific gravity at 25 °C. 0.850 to 0.870.
- (b)Refractive index at 20 °C. 1.4740 to 1.4780.
- (c)Optical rotation at 20 °C. +30° to +50°.
- (d)Aldehyde content (as citral). 0.5 to 3.0 percent.
- (e)Terpene content (as limonene). 45 percent minimum.