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EINECS 201-468-0
CAS No. 83-31-8 Density 1.556g/cm3
PSA 51.75000 LogP 3.00170
Solubility N/A Melting Point 154-157 °C (dec.)(lit.)
Formula C10H6O3S Boiling Point 419.524 °C at 760 mmHg
Molecular Weight 206.222 Flash Point 207.521 °C
Transport Information 25kgs Appearance light yellow crystal
Safety 22-28 Risk Codes 38
Molecular Structure Molecular Structure of 83-31-8 (1,8-Naphthosultone) Hazard Symbols IrritantXi

1,8-Naphthosultone;1-Naphthalenesulfonic acid, 8-hydroxy-, g-sultone;1-Naphthol-8-sulfonic acid sultone;NSC26341;Naphthosultone;

Article Data 13

1,8-Naphthosultone Specification

The 1,8-Naphthosultone, with the CAS registry number 83-31-8 and EINECS registry number 201-468-0, has the systematic name of naphtho[1,8-cd][1,2]oxathiole 2,2-dioxide. It belongs to the product category of Intermediates of Dyes and Pigments. And the molecular formula of the chemical is C10H6O3S.

The characteristics of 1,8-Naphthosultone are as followings: (1)ACD/LogP: 2.34; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 2.335; (4)ACD/LogD (pH 7.4): 2.335; (5)ACD/BCF (pH 5.5): 35.039; (6)ACD/BCF (pH 7.4): 35.039; (7)ACD/KOC (pH 5.5): 443.822; (8)ACD/KOC (pH 7.4): 443.822; (9)#H bond acceptors: 3; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 51.75 Å2; (13)Index of Refraction: 1.729; (14)Molar Refractivity: 52.817 cm3; (15)Molar Volume: 132.519 cm3; (16)Polarizability: 20.938×10-24cm3; (17)Surface Tension: 63.727 dyne/cm; (18)Density: 1.556 g/cm3; (19)Flash Point: 207.521 °C; (20)Enthalpy of Vaporization: 64.714 kJ/mol; (21)Boiling Point: 419.524 °C at 760 mmHg; (22)Vapour Pressure: 0 mmHg at 25°C.

Preparation of 1,8-Naphthosultone: This chemical can be prepared by 8-amino-naphthalene-1-sulfonic acid. The reaction will need reagent NaNO2 and aq. HCl, and the menstruum H2O. The reaction time is 1 hour with heating, and the yield is about 92%.

Uses of 1,8-Naphthosultone: It can be used to produce naphth[1,8-cd][1,2]oxathiol-2,2-dioxide. This reaction will need reagent potassium hydroxide and sodium hydroxide. The reaction time is 30 minutes with temperature of 225°C, and the yield is about 83%.

You should be cautious while dealing with this chemical. It irritates to skin. Therefore, you had better take the following instructions: Do not breathe dust, and after contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer).

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: c1cc2cccc3c2c(c1)OS3(=O)=O
(2)InChI: InChI=1/C10H6O3S/c11-14(12)9-6-2-4-7-3-1-5-8(13-14)10(7)9/h1-6H

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