Molecular Structure of  4-Mercaptophenol (CAS NO.637-89-8):

IUPAC Name: 4-sulfanylphenol
Molecular Formula: C₆H₆OS
Molecular Weight: 126.176240 g/mol
Melting Point: 33-35 °C(lit.)
Density: 1.255 g/cm³
H bond acceptors: 1
H bond donors: 1
Freely Rotating Bonds: 2
Polar Surface Area: 34.53Ų
Index of Refraction: 1.642
Molar Refractivity: 36.3 cm³
Molar Volume: 100.4 cm³
Surface Tension: 52.7 dyne/cm
Flash Point: 108.7 °C
Enthalpy of Vaporization: 51.35 kJ/mol
Boiling Point: 256.1 °C at 760 mmHg
Vapour Pressure: 0.00979 mmHg at 25°C
Water Solubility: 4733 mg/L at 25 °C
Sensitive: Air
EINECS: 211-307-6
Categories: Phenol&Thiophenol&Mercaptan; Phenoles and thiophenoles; Miscellaneous

Safety Information of 4-Mercaptophenol (CAS NO.637-89-8):
Hazard Codes: Xi; Xn;C
Risk Statements: 36/37/38-34-20/21/22
36/37/38:Irritating to eyes, respiratory system and skin
34:Causes burns
20/21/22:Harmful by inhalation, in contact with skin and if swallowed
Safety Statements: 26-36/37-45-36/37/39-36-7/9
26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36/37:Wear suitable protective clothing and gloves
45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
36/37/39:Wear suitable protective clothing, gloves and eye/face protection
36:Wear suitable protective clothing
7/9:Keep container tightly closed and in a well-ventilated place
RIDADR: 2811
WGK Germany: 3
RTECS: MX7175000
F: 10-13-23
Hazard Note: Harmful/Irritant
PackingGroup: III

  4-Mercaptophenol , with CAS number of 637-89-8, can be called Phenol,p-mercapto- (6CI,7CI,8CI) ; 4-Hydroxybenzenethiol ; Monothiohydroquinone ; Thiohydroquinone ; p-Hydroxybenzenethiol ; p-Hydroxythiophenol ; p-Mercaptophenol . It is stored in a cool, dry place with a tightly closed container. 4-Mercaptophenol (CAS NO.637-89-8) is used for the synthesize of methasulfocarb and used as a pharmaceutical intermediate.