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98-71-5

Basic Information
CAS No.: 98-71-5
Name: 4-Hydrazinobenzenesulfonic acid
Article Data: 35
Molecular Structure:
Molecular Structure of 98-71-5 (4-Hydrazinobenzenesulfonic acid)
Formula: C6H8 N2 O3 S
Molecular Weight: 188.207
Synonyms: Benzenesulfonicacid, 4-hydrazino- (9CI); Benzenesulfonic acid, p-hydrazino- (6CI,7CI,8CI);4-Hydrazinobenzenesulfonic acid; 4-Sulfophenylhydrazine; NSC 1608;Phenylhydrazine-4-sulfonic acid; Phenylhydrazine-p-sulfonic acid;p-Hydrazinobenzenesulfonic acid; p-Hydrazinophenylsulfonic acid;p-Sulfophenylhydrazine
EINECS: 202-694-2
Density: 1.583g/cm3
Melting Point: Decomposes
Boiling Point: °Cat760mmHg
Flash Point: °C
Solubility: soluble
Appearance: yellow powder
Hazard Symbols: UN NO.
Risk Codes: 36/37/38
Safety: Moderately toxic by ingestion. When heated to decomposition it emits very toxic fumes of SOx and NOx.
Transport Information: 25kgs
PSA: 100.80000
LogP: 2.07300
Synthetic route
2154-66-7

4-sulfobenzenediazonium

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
Stage #1: 4-sulfobenzenediazonium With sodium sulphite-heptahydrate In water at 0 - 5℃; for 2h;
Stage #2: With hydrogenchloride In water for 0.5h;
96%
With sulfuric acid; sodium sulfite at 0 - 5℃;95%
121-57-3

4-aminobenzene sulfonic acid

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
Stage #1: 4-aminobenzene sulfonic acid With sulfuric acid; sodium carbonate; sodium nitrite In water at 5℃;
Stage #2: With hydrogenchloride; sodium sulfite In water at 5℃; Reflux;
85%
Stage #1: 4-aminobenzene sulfonic acid With sulfuric acid; sodium carbonate; sodium nitrite In water at 12℃; Cooling with ice;
Stage #2: With sodium sulfite In water at 5℃; Heating;
Stage #3: With hydrogenchloride; zinc In water at 20℃; for 12h;
74%
Diazotization.Behandeln mit Na2SO3 und Spalten mit Salzsaeure;

4-Sulfo-benzenediazonium; hydrogen sulfate

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
Stage #1: 4-Sulfo-benzenediazonium; hydrogen sulfate With sodium sulfite In water Heating / reflux;
Stage #2: With hydrogenchloride In water
85%
305-80-6

4-diazobenzenesulfonic acid

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
With potassium sulfite Kochen mit konz. Salzsaeure;
With sodium dithionite Hydrolyse des Reaktionsprodukts mit kochender Salzsaeure;
61734-81-4

4-nitroamino-benzenesulfonic acid

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
With sodium amalgam
64-17-5

ethanol

4-[N'-(α-hydroxy-3,4-methylenedioxy-benzyl)-hydrazino]-benzenesulfonic acid

A

120-57-0

piperonal

B

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
allmaehliche Zersetzung;

4-[N'-(α-hydroxy-3,4-methylenedioxy-benzyl)-hydrazino]-benzenesulfonic acid

64-19-7

acetic acid

A

120-57-0

piperonal

B

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
schnelle Zersetzung;
100-63-0

phenylhydrazine

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
With sulfuric acid at 80 - 100℃;

4-[N'-(α-hydroxy-3,4-methylenedioxy-benzyl)-hydrazino]-benzenesulfonic acid

A

120-57-0

piperonal

B

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
allmaehliche Zersetzung;

4-[N'-(α-hydroxy-3,4-methylenedioxy-benzyl)-hydrazino]-benzenesulfonic acid

hot water

hot water

A

120-57-0

piperonal

B

98-71-5

4-hydrazino-benzenesulfonic acid

Conditions
ConditionsYield
schnelle Zersetzung;
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    Product Name: 4-Hydrazinobenzenesulfonic acid CAS: 98-71-5 MF: C6H8N2O3S MW: 188.2 EINECS: 202-694-2 Mol File: 98-71-5.mol 4-Hydrazinobenzenesulfonic acid Structure 4-Hydrazinobenzenesulfonic acid Chemical Properties Melting point

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Chemistry

Phenylhydrazine-p-Sulfonic Acid(98-71-5) is also named as 4-hydrazino-benzenesulfonicaci;4-sulfophenylhydrazine;6,7-Dihydro-5,8-dimethyldibenzo[b,j][1,10]phenanthroline;Phenylhydrazinesulfonic acid;Sulfanilic acid, N-amino-;p-Hydrazinophenylsulfonic acid;p-Hydrazinobenzenesulfonic acid,and so on.Phenylhydrazine-p-Sulfonic Acid(98-71-5) is white to light yellow crystal powder.

CAS: 98-71-5
Molecular Formula: C6H8N2O3S
Molecular Weight: 188.2
Molecular structure:
EINECS: 202-694-2
Melting point:  285°C
Merck:  4773
Index of Refraction: 1.669 
Molar Refractivity: 44.37 cm3 
Molar Volume: 118.8 cm3 
Polarizability: 17.59 10-24cm3 
Surface Tension: 80.9 dyne/cm 
Density: 1.583 g/cm3 

Uses

Phenylhydrazine-p-Sulfonic Acid(98-71-5) is commonly used as a dye intermediate.

Toxicity Data With Reference

1.   

orl-rat LDLo:500 mg/kg

   JPETAB    Journal of Pharmacology and Experimental Therapeutics. 90 (1947),260.

RTECS:  DB6900000

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Moderately toxic by ingestion. When heated to decomposition it emits very toxic fumes of SOx and NOx.

Hazard Codes:  Xi
Risk Statements:  36/37/38 (36/37/38:  Irritating to eyes, respiratory system and skin)
Safety Statements:  26-36/37/39 (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)
Hazard Note:  Irritant