1-Hydroxynaphthalene-8-sulfonic acid
- CAS NO.:117-22-6
- Empirical Formula: C10H8O4S
- Molecular Weight: 224.23
- MDL number: MFCD00065328
- EINECS: 204-180-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-12-18 14:08:52
What is 1-Hydroxynaphthalene-8-sulfonic acid?
Chemical properties
1-Hydroxynaphthalene-8-sulfonic acid [117-22-6]. (8-hydroxynaphthalene-1-sulfonic acid), C10H8O4S, Mr 224.2, crystallizes as the monohydrate with mp 106℃. Sulfonation gives 1-hydroxynaphthalene-4,8-disulfonic acid, and alkali fusion with potassium hydroxide at 230℃ yields 1,8-dihydroxynaphthalene. Coupling with diazo compounds occurs in the 2- position.
The Uses of 1-Hydroxynaphthalene-8-sulfonic acid
The naphthosultone is usually satisfactory as an intermediate for further processing; however, for azo dye preparation the free naphthol must be used, for example, in C.I. Acid Black 54 and C.I. Acid Blue 158.
Production Methods
1-Aminonaphthalene-8-sulfonic acid is diazotized over 16 h at 50℃ and then heated to 80 ℃. After cooling, the precipitated naphthosultone is filtered off and washed. The sultone is heated with dilute sodium hydroxide at 100℃, which causes ring opening; the product is isolated after salting out.
Properties of 1-Hydroxynaphthalene-8-sulfonic acid
Density | 1.549 |
pka | 0.05±0.40(Predicted) |
CAS DataBase Reference | 117-22-6(CAS DataBase Reference) |
EPA Substance Registry System | 1-Naphthalenesulfonic acid, 8-hydroxy- (117-22-6) |
Safety information for 1-Hydroxynaphthalene-8-sulfonic acid
Signal word | Warning |
Pictogram(s) |
Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 1-Hydroxynaphthalene-8-sulfonic acid
1-Hydroxynaphthalene-8-sulfonic acid manufacturer
Apurva Chemicals
New Products
(S)-3-Aminobutanenitrile hydrochloride 4-Methylphenylacetic acid N-Boc-D-alaninol N-BOC-D/L-ALANINOL Tert-butyl bis(2-chloroethyl)carbamate 3-Morpholino-1-(4-nitrophenyl)-5,6-dihydropyridin- 2(1H)-one Furan-2,5-Dicarboxylic Acid Tropic acid 1-Bromo-3,5-Di-Tert-Butylbenzene S-2-CHLORO PROPIONIC ACID ETHYL ISOCYANOACETATE 2-Bromo-1,3-Bis(Dimethylamino)Trimethinium Hexafluorophosphate 4-IODO BENZOIC ACID 3-NITRO-2-METHYL ANILINE 1-(2,4-DICHLOROPHENYL) ETHANAMINE (2-Hydroxyphenyl)acetonitrile 4-Bromopyrazole 2-(Cyanocyclohexyl)acetic acid 4-methoxy-3,5-dinitropyridine 1-(4-(aminomethyl)benzyl)urea hydrochloride 2-aminopropyl benzoate hydrochloride diethyl 2-(2-((tertbutoxycarbonyl)amino) ethyl)malonate tert-butyl 4- (ureidomethyl)benzylcarbamate Ethyl-2-chloro((4-methoxyphenyl)hydrazono)acetateRelated products of tetrahydrofuran
You may like
-
117-22-6 1-Naphthol-8-sulfonic acid 98%View Details
117-22-6 -
2033-24-1 98%View Details
2033-24-1 -
1975-50-4 98%View Details
1975-50-4 -
2-HYDROXY BENZYL ALCOHOL 98%View Details
90-01-7 -
2-Chloro-1,3-Bis(Dimethylamino)Trimethinium Hexafluorophosphate 221615-75-4 98%View Details
221615-75-4 -
61397-56-6 CIS BROMO BENZOATE 98%View Details
61397-56-6 -
14714-50-2 (2-Hydroxyphenyl)acetonitrile 98+View Details
14714-50-2 -
118753-70-1 98+View Details
118753-70-1