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  • 8.14725 - Toluene-4-sulfonic acid monohydrate

8.14725 EMD Millipore

Toluene-4-sulfonic acid monohydrate

Toluene-4-sulfonic acid monohydrate for synthesis. CAS No. 6192-52-5, EC Number 203-180-0., for synthesis

Synonym: p-Toluenesulfonic acid, Tosylic acid, Tosic acid, PTSA

  • CAS Number 6192-52-5

  • Linear Formula C₇H₈O₃S * H₂O

  • Molecular Weight 190.22 g/mol

  •  EC Number 203-180-0



Related Categories Acids, Acids & Bases, Building Blocks, Chemical Synthesis, Organic Building Blocks,
bp   140 °C (27 hPa)
solubility   750 g/l
flash point   180 °C
autoignition temp.   600 °C
mp   56 °C Elimination of water of crystallisation
pH   1 (650 g/l, H₂O, 20 °C) (anhydrous substance)
bulk density   510 kg/m3
LD 50 oral   LD50 Rat 2570 mg/kg
shipped in   ambient
storage temp.   Store below +30°C.
specifications   Assay (acidimetric, calc. on anhydrous substance): ≥ 98.0 %
  Water (K. F.): 8.0 - 12.0 %
  Identity (IR): passes test

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Safety Information

HS Code 
2904 10 00
Hazard Statement(s) 
H315: Causes skin irritation.
H319: Causes serious eye irritation.
H335: May cause respiratory irritation.
Precautionary Statement(s) 
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. Continue rinsing.
Storage class 
8A Combustible, corrosive hazardous materials
WGK 1 slightly water endangering
Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.
Hazard Pictogram(s) 
GHS07  GHS07
Hazard Symbols 
Irritant  Irritant
Declaration (railroad and road) ADR, RID 
UN 2585 , 8, III
Declaration (transport by air) IATA-DGR 
UN 2585 , 8, III
Declaration (transport by sea) IMDG-Code 
UN 2585 , 8, III, Segregation Group: 1 (Acids)
Categories of danger 
R Phrase 
R 36/37/38
Irritating to eyes, respiratory system and skin.
S Phrase 
S 26-37
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable gloves.
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