Other grades of this product :
| 2-Naphthalenethiol Basic information |
| 2-Naphthalenethiol Chemical Properties |
| Melting point | 79-81 °C (lit.) | | Boiling point | 286 °C (lit.) | | density | 1.22 | | refractive index | 1.589-1.591 | | FEMA | 3314 | 2-NAPHTHALENTHIOL | | Fp | 69 °C | | storage temp. | Inert atmosphere,Room Temperature | | solubility | diethyl ether: very soluble(lit.) | | form | Powder | | pka | 6?+-.0.30(Predicted) | | color | Almost white to cream | | Water Solubility | Soluble in alcohol, dipropylene glycol. Soluble in water 34.4 mg/L @ 25°C. | | Sensitive | Air Sensitive | | Merck | 14,6379 | | JECFA Number | 531 | | BRN | 636389 | | CAS DataBase Reference | 91-60-1(CAS DataBase Reference) | | NIST Chemistry Reference | 2-Naphthalenethiol(91-60-1) | | EPA Substance Registry System | 2-Naphthalenethiol (91-60-1) |
| Hazard Codes | Xn,Xi | | Risk Statements | 22-20/21/22 | | Safety Statements | 36/37 | | RIDADR | UN 3335 | | WGK Germany | 3 | | RTECS | QK3930000 | | F | 13 | | Hazard Note | Harmful/Irritant | | TSCA | Yes | | HS Code | 29309070 |
| 2-Naphthalenethiol Usage And Synthesis |
| Description | 2-Naphthalenthiol has a disagreeable mercaptan-like odor. May be prepared by catalytic hydrogenation of a sulfonic acid derivative of naphthalene; by reduction of naphthalenesulfonyl chloride with zinc. | | Chemical Properties | 2-Naphthyl mercaptan has a disagreeable sulfurous, mushroom, meaty odor | | Chemical Properties | Almost white to cream powder | | Uses | 2-Thionaphthol was used in the preparation of cholesterol monolayer and multilayer Langmuir- Blodgett (LB) films. The magnetic resonance shift for a self-assembled monolayer of 2-naphthalenethiol was studied that suggested considerable promise in flexible and transparent photonic devices for biological and chemical sensing. | | Preparation | By catalytic hydrogenation of a sulfonic acid derivative of naphthalene; by reduction of naphthalenesulfonyl chloride with zinc. | | Taste threshold values | Taste characteristics at 10 ppm: sulfurous, meaty, brown, roasted, chicken, eggy with a slight nutty nuance | | Synthesis Reference(s) | The Journal of Organic Chemistry, 31, p. 3980, 1966 DOI: 10.1021/jo01350a023Tetrahedron Letters, 37, p. 4523, 1996 DOI: 10.1016/0040-4039(96)00873-8 | | General Description | The magnetic resonance shift for a self-assembled monolayer of 2-naphthalenethiol was studied that suggested considerable promise in flexible and transparent photonic devices for biological and chemical sensing. | | Safety Profile | Poison by ingestion and
intraperitoneal routes. A mosquito larvicide.
When heated to decomposition it emits
highly toxic fumes of SOx. | | Purification Methods | It is steam volatile. It has to be distilled under Ar or N2, as it oxidises to the disulfide, and crystallises from EtOH. The S-methyl derivative has m 104-105o (from *C6H6/pet ether), and the S-ethyl derivative M 188.2, has m 16o and b 175-170.5o/15mm. The S-acetate has m 53.5o and b 191o/15mm, and the diethylamine salt forms yellow needles m 107o from dioxane. [Beilstein 6 H 657, 6 I 316, 6 II 610, 6 III 3006, 6 IV 4312.] |
| 2-Naphthalenethiol Preparation Products And Raw materials |
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