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Name	4-Hydroxybenzenesulfonic acid	EINECS	202-691-6
CAS No.	98-67-9	Density	1.574 g/cm³
PSA	82.98000	LogP	1.71970
Solubility	Soluble in water.	Melting Point	50(分解)oC
Formula	C₆H₆O₄S	Boiling Point	275.14°C (rough estimate)
Molecular Weight	174.177	Flash Point	N/A
Transport Information	UN 2586 8/PG 3	Appearance	yellowish oily liquid
Safety	26-36/37/39-45	Risk Codes	34
Molecular Structure		Hazard Symbols	C
Synonyms	Benzenesulfonicacid, p-hydroxy- (8CI);Benzenesulfonic acid,4-hydroxy-;4-Hydroxyphenylsulfonicacid;4-Phenolsulfonic acid;NSC 227908;p-Hydroxybenzenesulfonic acid;p-Phenolsulfonic acid;p-Sulfophenol;phenol sulfonic acid;4-Hydroxyphenylsulfonic acid;	Article Data	69

4-Hydroxybenzenesulfonic acid Synthetic route

: 64-17-5
ethanol

: 391859-81-7
2-hydroxy-5-sulfo-benzenediazonium-betaine

: 98-67-9
p-hydoroxybenzenesulfonic acid

: 2154-66-7
4-sulfobenzenediazonium

: 98-67-9
p-hydoroxybenzenesulfonic acid

Conditions

Conditions	Yield
With water

: 305-80-6
4-diazobenzenesulfonic acid

: 98-67-9
p-hydoroxybenzenesulfonic acid

Conditions

Conditions	Yield
Geschwindigkeit der Zersetzung bei Ultraviolett-Bestrahlung zwischen pH 1und 10 und Temperaturen zwischen 35grad und 100grad;

: 98-66-8
4-chloro-benzenesulfonic acid

: 98-67-9
p-hydoroxybenzenesulfonic acid

Conditions

Conditions	Yield
With sodium hydroxide at 300℃;
With quicklime; water; copper at 180 - 200℃;
With barium dihydroxide; water; copper at 180 - 200℃;
With quicklime; water at 180 - 200℃; in Gegenwart von Kupferverbindungen;
With barium dihydroxide; water at 180 - 200℃; in Gegenwart von Kupferverbindungen;

: 138-36-3
p-bromobenzene sulfonic acid

: 98-67-9
p-hydoroxybenzenesulfonic acid

Conditions

Conditions	Yield
With quicklime; water; copper at 180 - 200℃;
With barium dihydroxide; water; copper at 180 - 200℃;
With quicklime; water at 180 - 200℃; in Gegenwart von Kupferverbindungen;
With barium dihydroxide; water at 180 - 200℃; in Gegenwart von Kupferverbindungen;

: 25117-74-2
4-ethoxybenzonitrile

: 98-67-9
p-hydoroxybenzenesulfonic acid

Conditions

Conditions	Yield
With sulfuric acid

: 609-46-1
phenol-2-sulfonic acid

: 98-67-9
p-hydoroxybenzenesulfonic acid

Conditions

Conditions	Yield
With sulfuric acid

: 5857-93-2
2-amino-4-hydroxy-benzenesulfonic acid

: 98-67-9
p-hydoroxybenzenesulfonic acid

Conditions

Conditions	Yield
Erhitzen der entstandenen Diazoverbindung mit Alkohol und Kupferpulver.Diazotization;

: 156570-57-9
6.4'-Dioxy-3-methyl-diphenylsulfon

A: 98-67-9
p-hydoroxybenzenesulfonic acid

B: 7134-06-7
4-hydroxy-toluene-3-sulfonic acid

Conditions

Conditions	Yield
With sulfuric acid

: 118-55-8
phenyl Salicylate

: 98-67-9
p-hydoroxybenzenesulfonic acid

Conditions

Conditions	Yield
With sulfuric acid

4-Hydroxybenzenesulfonic acid Chemical Properties

IUPAC: 4-Hydroxybenzenesulfonic acid
Molecular Formula: C₆H₆O₄S
Molecular Weight: 174.17 g/mol
Density: 1.337 g/mL at 25 °C
Refractive Index: n20/D 1.489
Stability: Stable. Combustible. Incompatible with strong oxidizing agents.
Molar Refractivity: 38.63 cm³
Molar Volume: 110.6 cm³
Polarizability: 15.31×10^-24cm³
Surface Tension: 66.1 dyne/cm
The structure of 4-Hydroxyphenylsulfonic acid (CAS NO.98-67-9):

XLogP3: 0.2
H-Bond Donor: 2
H-Bond Acceptor: 4
Rotatable Bond Count: 1
Tautomer Count: 2
Exact Mass: 173.998679
MonoIsotopic Mass: 173.998679
Topological Polar Surface Area: 74.6
Heavy Atom Count: 11
Canonical SMILES: C1=CC(=CC=C1O)S(=O)(=O)O
InChI: InChI=1S/C6H6O4S/c7-5-1-3-6(4-2-5)11(8,9)10/h1-4,7H,(H,8,9,10)
InChIKey: FEPBITJSIHRMRT-UHFFFAOYSA-N
EINECS: 202-691-6
Product Categories: Intermediates of Dyes and Pigments;Organic acids

4-Hydroxybenzenesulfonic acid Uses

4-Hydroxyphenylsulfonic acid (CAS NO.98-67-9) is mainly used for the resin cure. It is also used as a casting resin curing agent at room temperature.

4-Hydroxybenzenesulfonic acid Toxicity Data With Reference

orl-mus LD50:6400 mg/kg

JAFCAU Journal of Agricultural and Food Chemistry. 15 (1967),845.

4-Hydroxybenzenesulfonic acid Consensus Reports

Reported in EPA TSCA Inventory.

4-Hydroxybenzenesulfonic acid Safety Profile

Mildly toxic by ingestion. When heated to decomposition it emits toxic vapors of SO_x.
Hazard Codes: C
Risk Statements: 34
34: Causes burns
Safety Statements: 26-36/37/39-45
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36/37/39: Wear suitable protective clothing, gloves and eye/face protection
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
RIDADR: UN 2586 8/PG 3
RTECS: DB6970000
HazardClass: 8
PackingGroup: III

4-Hydroxybenzenesulfonic acid Specification

4-Hydroxyphenylsulfonic acid (CAS NO.98-67-9) is also named as 4-11-00-00582 (Beilstein Handbook Reference) ; 4-Hydroxybenzenesulfonic acid ; 4-Phenolsulfonic acid ; BRN 1869034 ; Benzenesulfonic acid, 4-hydroxy- ; Benzenesulfonic acid, p-hydroxy- ; HSDB 5319 ; NSC 227908 ; Sulfocarbolic acid ; p-Hydroxybenzenesulfonic acid ; p-Phenolsulfonic acid ; p-Sulfophenol . 4-Hydroxyphenylsulfonic acid (CAS NO.98-67-9) is yellowish oily liquid.

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