White flaky crystals, with special odor; insoluble in water, soluble in ethanol, ether, benzene, etc.; a basic raw material for dyes, pharmaceuticals and pesticides, used in the synthesis of naphthalene series dyes, anti-aging agents, plasticizers, etc. Hazard Class: General chemicals; skin irritation
Chinese alias：
English alias：Refined naphthalene；Industrial refined naphthalene
Basic raw material for dyes/pharmaceuticals/pesticides; used in the synthesis of naphthalene series dyes (such as anthraquinone dyes, azo dyes), pharmaceuticals (such as anti-aging agents), pesticides (such as insecticides), also as raw material for plasticizers and lubricants, a basic intermediate in chemical industry
| No. | Item | Superior Grade | First Grade | Second Grade |
| 1 | Appearance | White, powdery or flaky crystalline solid | White, slightly reddish or yellowish, powdery or flaky crystalline solid | |
| 2 | Naphthalene content / % | ≥ 99.30 | ≥ 98.95 | ≥ 98.45 |
| 3 | Crystallizing point / ℃ | ≥ 79.8 | ≥ 79.6 | ≥ 79.3 |
| 4 | Non-volatile matter / % | — | ≤ 0.01 | ≤ 0.02 |
| 5 | Ash content / % | — | ≤ 0.006 | ≤ 0.008 |
| 6 | Acid washing colorimetric number / No. | Not darker than No. 2 | Not darker than No. 4 | — |
Address: Block B, Interstellar Center, Yuhua District, Shijiazhuang City, Hebei Province
