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93-01-6

Basic Information
CAS No.: 93-01-6
Name: 6-Hydroxynaphthalene-2-sulphonic acid
Article Data: 54
Molecular Structure:
Molecular Structure of 93-01-6 (6-Hydroxynaphthalene-2-sulphonic acid)
Formula: C10H8 O4 S
Molecular Weight: 224.237
Synonyms: 2-Hydroxy-6-naphthalenesulfonicacid; 2-Naphthol-6-sulfonic acid; 6-Hydroxy-2-naphthalenesulfonic acid; NSC5871; Schaeffer's acid; Schaeffer's b-acid; Schaeffer's b-naphtholsulfonic acid; Schaffer's acid; b-Naphthol-6-sulfonic acid; b-Naphtholsulfonic acid S
EINECS: 202-209-4
Density: 1.549 g/cm3
Melting Point: >300 ºC(lit.)
Boiling Point:
Solubility: soluble AUTOIGNITION
Appearance: White to gray-yellow powder
Hazard Symbols: TSCA listed UN NO.
Risk Codes: 36/37/38
Safety: Poison by ingestion. Moderately toxic by subcutaneous route. When heated to decomposition it emits toxic fumes of SOx. See also SULFONATES.
Transport Information: 25kgs
PSA: 82.98000
LogP: 2.87290
Synthetic route
135-19-3

β-naphthol

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With sulfuric acid
With 1,4-dioxane; sulfur trioxide; 1,2-dichloro-ethane
With chlorosulfonic acid; 1,1,2,2-tetrachloroethane at 100℃;
With sulfuric acid at 80℃; for 6h; Temperature;128 g
80073-10-5

1-acetamino-2-hydroxy-naphthalene-6-sulphonic acid

118-28-5

1-amino-2-ethoxy-naphthalene-6-sulphonic acid

93-01-6

2-naphthol-6-sulfonic acid

2-hydroxy-naphthalene-disulfonic acid-(1.6)

2-hydroxy-naphthalene-disulfonic acid-(1.6)

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With mineral acid
80073-10-5

1-acetamino-2-hydroxy-naphthalene-6-sulphonic acid

75-00-3

chloroethane

118-28-5

1-amino-2-ethoxy-naphthalene-6-sulphonic acid

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With potassium hydroxide
135-19-3

β-naphthol

A

132-57-0

7-hydroxy-naphthalene-1-sulfonic acid

B

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With sulfuric acid
With sulfuric acid
135-19-3

β-naphthol

A

118-32-1

2-naphthol-6,8-disulfonic acid

B

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With sulfuric acid at 60℃; Trennung ueber mehreren Stufen nach mehreren Verfahren (Trennung der γ-Saeure von der R-Saeure);
With sulfuric acid at 60℃; Trennung ueber mehreren Stufen nach mehreren Verfahren (Trennung der γ-Saeure von der R-Saeure);
2-oxy-naphthoic acid-(1)-sulfonic acid-(6)

2-oxy-naphthoic acid-(1)-sulfonic acid-(6)

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With water at 60℃;
potassium-<2-hydroxy-naphthalene sulfonate-(1)>

potassium-<2-hydroxy-naphthalene sulfonate-(1)>

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With quartz sand at 200℃;
potassium naphthyl-(2)-sulfate

potassium naphthyl-(2)-sulfate

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With potassium hydrogensulfate at 200℃;
613-80-9

2,2'-Dinaphthyl ether

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With sulfuric acid at 90 - 100℃;
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Chemistry

6-Hydroxy-2-Naphalenesulfonic Acid (93-01-6) is also named as 6-Hydroxynaphthalene-2-sulphonic acid;2-Hydroxy-6-naphthalenesulfonic acid;2-hydroxy-6-naphthalenesulfonicacid;2-Hydroxynaphthalene-6-sulfonic acid;2-Naphtol-6-sulfosaure;6-hydroxy-2-naphthalenesulfonicaci;Baum's acid;beta-Naphthol-6-sulfonic acid;beta-naphthol-6-sulfonicacid,and so on.6-Hydroxy-2-Naphalenesulfonic Acid (93-01-6) is usually lamellae.

CAS: 93-01-6
Molecular Formula: C10H8O4S
Molecular Weight: 224.23
Molecular structure:
EINECS: 205-218-1
Melting point:  >300 °C(lit.)
Index of Refraction: 1.703 
Molar Refractivity: 56.18 cm3 
Molar Volume: 144.7 cm3 
Polarizability: 22.27 10-24cm3 
Surface Tension: 71.1 dyne/cm 
Density: 1.549 g/cm3 

Uses

6-Hydroxy-2-Naphalenesulfonic Acid (93-01-6) is commonly used for the manufacture of acidic dyes and food dyes.

Toxicity Data With Reference

1.   

orl-mus LDLo:250 mg/kg

   ZHINAV    Zeitschrift fuer Hygiene und Infektionskrankheiten. 64 (1909),113.
2.   

scu-mus LDLo:650 mg/kg

   ZHINAV    Zeitschrift fuer Hygiene und Infektionskrankheiten. 64 (1909),113.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Poison by ingestion. Moderately toxic by subcutaneous route. When heated to decomposition it emits toxic fumes of SOx.

Hazard Codes:  Xi
Risk Statements:  36/37/38
Safety Statements:  26-36
WGK Germany:  3