O-THIOCRESOL
o-Toluenethiol
CAS: 137-06-4
Molecular Formula: C7H8S
O-THIOCRESOL - Names and Identifiers
O-THIOCRESOL - Physico-chemical Properties
| Molecular Formula | C7H8S |
| Molar Mass | 124.2 |
| Density | 1.054g/mLat 25°C(lit.) |
| Melting Point | 10-12°C(lit.) |
| Boling Point | 195°C(lit.) |
| Flash Point | 147°F |
| JECFA Number | 528 |
| Water Solubility | insoluble |
| Vapor Presure | 0.601mmHg at 25°C |
| Appearance | Liquid |
| Specific Gravity | 1.055 |
| Color | Clear colorless to pale yellow |
| Merck | 14,9325 |
| BRN | 774068 |
| pKa | pK1:6.64 (25°C) |
| Storage Condition | Store below +30°C. |
| Sensitive | Stench |
| Explosive Limit | 1.1%(V) |
| Refractive Index | n20/D 1.578(lit.) |
| Physical and Chemical Properties | Melting Point: 14 Boiling Point: 194 density: 1.054 |
O-THIOCRESOL - Risk and Safety
| Risk Codes | R37/38 - Irritating to respiratory system and skin. R41 - Risk of serious damage to eyes R36/37/38 - Irritating to eyes, respiratory system and skin. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S39 - Wear eye / face protection. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S23 - Do not breathe vapour. |
| UN IDs | 2810 |
| WGK Germany | 3 |
| RTECS | XT8750000 |
| TSCA | Yes |
| HS Code | 29309090 |
| Hazard Note | Harmful/Irritant/Stench |
| Hazard Class | 6.1 |
| Packing Group | III |
O-THIOCRESOL - Nature
Open Data Verified Data
light yellow to white oily liquid. The solid is a leaf-like crystal. Melting point 15 °c. Boiling point 194.3 °c. The relative density was 1. 041. Refractive index 1.5780. Flash Point 63. Soluble in ethanol, soluble in ether, insoluble in water. Can be volatilized with water vapor. She has extra odor.
Last Update：2025-06-10 22:55:16
O-THIOCRESOL - Preparation Method
Open Data Verified Data
after diazotization, o-toluidine is esterified with ethyl xanthate potassium to obtain O-toluate ethyl ester, which is made into O-toluenethiol potassium salt and then hydrolyzed by sulfuric acid.
Last Update：2022-01-01 10:56:02
O-THIOCRESOL - Application
Open Data Verified Data
raw materials for organic synthesis.
Last Update：2025-08-19 16:24:40
O-THIOCRESOL - Safety
Open Data Verified Data
- production equipment should be closed, the workshop should have good ventilation. Protective gear was worn by the operator.
- it was tightly sealed in glass bottle and protected by iron drum. Store in a cool, dry and ventilated place. Sun protection, moisture-proof. Light loading and light unloading during handling to avoid damage to the packaging. According to the general provisions of the storage and transportation of chemicals.
Last Update：2025-06-10 22:55:16
O-THIOCRESOL - Reference Information
| FEMA | 3240 | O-TOLUENETHIOL |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| toxicity | GRAS(FEMA). |
| usage limit | FEMA: baked goods, sauce, soup, all 0.20mg/kg. |
| Use | as a raw material for organic synthesis for synthesis. |
| production method | From o-toluidine by diazotization, esterification, hydrolysis. |
| category | corrosive article |
| toxicity grade | high toxicity |
| Acute toxicity | intraperitoneal-mouse LD50: 100 mg/kg |
| explosive hazard characteristics | corrosive to skin and cornea |
| flammability hazard characteristics | flammability; Emission of toxic sulfur oxide gases during combustion |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from the oxidant. |
| fire extinguishing agent | Sand, foam, carbon dioxide, water mist |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 19:05:07
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View History
O-THIOCRESOL
NSC 109461
Reactive Red 11
ISOPHORONE OXIDE
Propidium
Acid Violet 7 (C.I.)
Disulfur dichloride
Digallium trisulphide
C.I. Acid orange 89
溶剂红 8
NSC 109461
Reactive Red 11
ISOPHORONE OXIDE
Propidium
Acid Violet 7 (C.I.)
Disulfur dichloride
Digallium trisulphide
C.I. Acid orange 89
溶剂红 8