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Naphthalene CAS# 91-20-3
CAS Number: 91-20-3
Chemical Formula: C10H8
Synonyms:
NAPHTHALENE WHITE, PURE
Naphthalene, refined
Appearance: Colorless and shiny monoclinic crystal
HS Code: 29029010
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Products Description of Naphthalene CAS# 91-20-3
Naphthalene is the simplest condensed aromatic hydrocarbon composed of two benzene rings, commonly known as "sanitary ball". It is one of the main products of coal tar processing. Naphthalene appears in the form of crude naphthalene (industrial naphthalene and squeezed naphthalene) and refined naphthalene in industry. The molecular formula of naphthalene is C10H8, and the molecular weight is 128.17. The melting point is 80.28℃, the solid density is 1.145g/cm3, the liquid density (85℃) is 0.9752g/cm3, the specific heat capacity (100℃) is 1809J/(kg·K), and the refractive index (85℃) Chemicalbook is 1.5898. Naphthalene is a colorless monoclinic crystal, which is volatile and sublimable, has a special smell, is flammable, and can form an explosive mixture with air; its petroleum ether solution shows red-purple fluorescence under a mercury lamp, is almost insoluble in water, and can be dissolved in ether, alcohol, benzene and other solvents. Naphthalene vapor and dust can cause poisoning if inhaled or absorbed through the skin. The maximum allowable concentration in the air is 20 mg/m3. Naphthalene is one of the basic raw materials for industries such as dyes, plastics, paints, medicines and pesticides. It was once used directly as a moth-proof ball for clothing and fur.
Parameters
| Melting point | 80-82 °C (lit.) |
| Boiling point | 218 °C (lit.) |
| density | 0.99 |
| bulk density | 550-600mg/m3 |
| vapor density | 4.4 (vs air) |
| vapor pressure | 0.03 mm Hg ( 25 °C) |
| refractive index | 1.5821 |
| Fp | 174 °F |
| storage temp. | Store below +30°C. |
| solubility | methanol: soluble50mg/mL, clear, colorless |
| form | Faint beige to brown to salmon red powder |
| color | White to almost white |
| Specific Gravity | 1.145 |
| Odor | at 10.00 % in benzyl benzoate. pungent dry tarry |
| Odor Type | pungent |
| explosive limit | 0.9-5.9%(V) |
| Water Solubility | 30 mg/L (25 ºC) |
| Merck | 14,6370 |
| BRN | 1421310 |
| Henry's Law Constant | 5.64 at 25 °C (thermodynamic method-GC/UV spectrophotometry, Altschuh et al., 1999) |
| Exposure limits | TLV-TWA 10 ppm （～50 mg/m3) (ACGIH, MSHA, and OSHA); STEL 15 ppm (～75 mg/m3) (ACGIH); IDLH 500 ppm. |
| Dielectric constant | 2.5（85℃） |
| InChIKey | UFWIBTONFRDIAS-UHFFFAOYSA-N |
| LogP | 3.7 at 25℃ |
| CAS DataBase Reference | 91-20-3(CAS DataBase Reference) |
| IARC | 2B (Vol. 82) 2002 |
| NIST Chemistry Reference | Naphthalene(91-20-3) |
| EPA Substance Registry System | Naphthalene (91-20-3) |
Safety Information
| Hazard Codes | Xn,N,F,T |
| Risk Statements | 22-40-50/53-67-65-38-11-39/23/24/25-23/24/25-52/53-20 |
| Safety Statements | 36/37-46-60-61-62-45-16-7-33-25-9 |
| RIDADR | UN 1334 4.1/PG 3 |
| OEB | A |
| OEL | TWA: 10 ppm (50 mg/m3), STEL: 15 ppm (75 mg/m3) |
| WGK Germany | 3 |
| RTECS | QJ0525000 |
| Autoignition Temperature | 978 °F |
| TSCA | Yes |
| HazardClass | 4.1 |
| PackingGroup | III |
| HS Code | 29029010 |
| Hazardous Substances Data | 91-20-3(Hazardous Substances Data) |
| Toxicity | Acute oral LD50 for guinea pigs 1,200 mg/kg, mice 533 mg/kg, rats 1,250 mg/kg (quoted, RTECS, 1985). |
| IDLA | 250 ppm |
Product Application of Naphthalene CAS# 91-20-3
Mainly used in the production of phthalic anhydride, and also as a raw material for the production of dyes, medicines, etc.
Factory and Equipment Show
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