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m-Cresol

m-Cresol
m-Cresol structure
CAS No.
108-39-4
Chemical Name:
m-Cresol
Synonyms
m-Cesol;m-Kresol;m-Toluol;3-Cresol;M-CRESOL;m-Cresole;FEMA 3530;M-CresolGr;KRESOL-META;M-CRESOL 70
CBNumber:
CB7852747
Molecular Formula:
C7H8O
Formula Weight:
108.14
MOL File:
108-39-4.mol

m-Cresol Properties

Melting point:
8-10 °C(lit.)
Boiling point:
203 °C(lit.)
Density 
1.034 g/mL at 25 °C(lit.)
vapor density 
3.72 (vs air)
vapor pressure 
<1 mm Hg ( 20 °C)
refractive index 
n20/D 1.541(lit.)
FEMA 
3530 | M-CRESOL
Flash point:
187 °F
storage temp. 
2-8°C
solubility 
23.5g/l
pka
10.01(at 25℃)
form 
Liquid
color 
Clear colorless to slight red
PH
5 (20g/l, H2O, 20℃)
explosive limit
1.06-1.35%, 150°F
Water Solubility 
20 g/L (20 ºC)
λmax
273nm(lit.)
Merck 
14,2579
JECFA Number
692
BRN 
506719
Stability:
Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, strong acids, aluminium, aluminium alloys. Air and light sensitive. Hygroscopic.
CAS DataBase Reference
108-39-4(CAS DataBase Reference)
NIST Chemistry Reference
Phenol, 3-methyl-(108-39-4)
EPA Substance Registry System
Phenol, 3-methyl-(108-39-4)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
  • NFPA
Hazard Codes  T
Risk Statements  24/25-34-39/23/24/25-23/24/25
Safety Statements  36/37/39-45-36/37
RIDADR  UN 2076 6.1/PG 2
WGK Germany  1
RTECS  GO6125000
8
Autoignition Temperature 626 °C
TSCA  Yes
HazardClass  6.1
PackingGroup  II
HS Code  29071200
Hazardous Substances Data 108-39-4(Hazardous Substances Data)
Toxicity LD50 orally in rats: 2.02 g/kg (Deichmann, Witherup)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H227 Combustible liquid Flammable liquids Category 4 Warning P210, P280, P370+P378, P403+P235,P501
H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501
H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, P405, P501
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501
H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501
H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
H401 Toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 2 P273, P501
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P310 Immediately call a POISON CENTER or doctor/physician.
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P307+P311 IF exposed: call a POISON CENTER or doctor/physician.
P370+P378 In case of fire: Use … for extinction.
P405 Store locked up.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P403+P235 Store in a well-ventilated place. Keep cool.
P501 Dispose of contents/container to..…

NFPA 704

Diamond Hazard Value Description
2
0
Health  
Flammability   2 Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur and multiple finely divided suspended solids that do not require heating before ignition can occur. Flash point between 37.8 and 93.3 °C (100 and 200 °F). (e.g. diesel fuel, sulfur)
Instability   0 Normally stable, even under fire exposure conditions, and is not reactive with water (e.g. helium,N2)
Special  

(NFPA, 2010)

m-Cresol price More Price(24)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 1395204 Metacresol United States Pharmacopeia (USP) Reference Standard 108-39-4 1ml $348 2018-11-13 Buy
Sigma-Aldrich 40251-U 3-Methylphenol certified reference material, 5000 μg/mL in methanol 108-39-4 u $44.6 2018-11-13 Buy
TCI Chemical C0401 m-Cresol >98.0%(GC) 108-39-4 25g $14 2018-11-22 Buy
TCI Chemical C0401 m-Cresol >98.0%(GC) 108-39-4 500g $44 2018-11-22 Buy
Alfa Aesar A10733 m-Cresol, 99% 108-39-4 250g $28.1 2018-11-13 Buy

m-Cresol Chemical Properties,Uses,Production

Chemical Properties

colourless to light yellow liquid

Chemical Properties

Cresol is a mixture of the three isomeric cresols, o-, m-, and p-cresol. Cresols are slightly soluble in water. m-Isomer: Colorless or yellow liquid with characteristic odor.

Chemical Properties

m-Cresol has a dry, tarry, medicinal–leathery odor. m-Cresol and p-cresol very often occur together and are difficult to separate.

Occurrence

Reported found in beer, coffee, egg, grape, Oriental tobacco, roasted barley, rum, sherry and whiskey.

Uses

Antiseptic; antimicrobial preservative.

Definition

ChEBI: A cresol with the methyl substituent at position 3. It is a minor urinary metabolite of toluene.

Preparation

One process involving butylation and separation and followed by dealkylation produces m-cresol and ditertiary butyl p-cresol. From m, p-cresol (which is the main product of the recovery process) pure m-cresol can be obtained by extraction.

Aroma threshold values

Aroma characteristics at 1.0%: phenolic, spicy eugenol-like, medicinal, smoky powdery with a leatherlike note.

Taste threshold values

Taste characteristics at 2 ppm: phenolic, smoky, balsamic, medicinal and spicy eugenol-like

General Description

Colorless liquid with a sweet tarry odor. Sinks and mixes slowly with water.

Air & Water Reactions

Water soluble.

Reactivity Profile

m-Cresol is sensitive to air, light and heat. m-Cresol is also hygroscopic. m-Cresol can react vigorously with strong oxidizers and strong bases. m-Cresol reacts violently with nitric acid, oleum, chlorosulfonic acid, metals and strong acids. If the water content is below approximately 0.3% and the temperature above 248° F, the corrosion of aluminum and its alloys may occur violently. m-Cresol will attack some forms of plastics, coatings and rubber.

Hazard

Questionable carcinogen.

Health Hazard

INHALATION: Mucosal irritation and systemic poisoning EYES: Intense irritation and pain, swelling of conjunctiva, and corneal damage may occur. SKIN: Intense burning, loss of feeling, wrinkling, white discoloration, and softening. Gangrene may occur. INGESTION: Burning sensation in mouth and esophagus. Vomiting may result. Acute exposure by all routes may cause muscular weakness, gastroenteric disturbances, severe depression, collapse. Effects are primarily on CNS and edema of lungs. Injury of spleen and pancreas may occur.

Contact allergens

Metacresol is contained as a preservative in almost all human insulin. It has been reported as a cause of allergic reaction due to injected insulin.

Safety Profile

v Poison by ingestion, intravenous, intraperitoneal, and subcutaneous routes. Moderately toxic by skin contact. Severe eye and skin irritant. An experimental teratogen. Human mutation data reported. Questionable carcinogen with experimental neoplastigenic data. Flammable when exposed to heat or flame. Moderately explosive in the form of vapor when exposed to heat or flame. See also other cresol entries and PHENOL.

Potential Exposure

Cresol is used as a disinfectant and fumigant; as an ore flotation agent, and as an intermediate in the manufacture of chemicals, dyes, plastics, and antioxidants. A mixture of isomers is generally used; the concentrations of the components are determined by the source of the cresol.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema Cresols 931 may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy

Shipping

UN2076 Cresols, liquid, Hazard class: 6.1; Labels: 6.1-Poisonous materials, 8-Corrosive material. UN3455 Cresols, solid, Hazard class: 6.1; Labels: 6.1- Poisonous materials, 8-Corrosive material.

Purification Methods

Separation of the m-and p-cresols requires chemical methods, such as conversion to their sulfonates [Brüchner Anal Chem 75 289 1928]. An equal volume of H2SO4 is added to m-cresol, stirred with a glass rod until solution is complete. Heat for 3hours at 103-105o. Dilute carefully with 1-1.5 volumes of water, heat to boiling point and steam distil until all unsulfonated cresol has been removed. Cool and extract the residue with ether. Evaporate the solution until the boiling point reaches 134o and steam distil off the m-cresol. Another purification method involves distillation, fractional crystallisation from the melt, then redistillation. Free from p-cresol by solution in glacial acetic acid and bromination by about half of an equivalent amount of bromine in glacial acetic acid. The acetic acid is distilled off, then fractional distillation of the residue under vacuum gives bromocresols from which 4-bromo-m-cresol is obtained by crystallisation from hexane. Addition of the bromocresol in glacial acetic acid slowly to a reaction mixture of HI and red phosphorus or (more smoothly) of HI and hypophosphorus acid, in glacial acetic acid, at reflux, removes the bromine. After an hour, the solution is distilled at atmospheric pressure until layers are formed. Then it is cooled and diluted with water. The cresol is extracted with ether, washed with water, NaHCO3 solution and again with water, dried with a little CaCl2 and distilled [Baltzly et al. J Am Chem Soc 77 2522 1955]. The 3,5-dinitrobenzoate (prepared with 3,5-dinitrobenzoyl chloride in dry pyridine, and recrystallised from EtOH or aqueous Me2CO) has m 165o. [Beilstein 6 IV 2035.]

Incompatibilities

Vapors may form explosive mixture with air. Incompatible with strong acids; oxidizers, alkalies, aliphatic amines; amides, chlorosulfonic acid; oleum. Decomposes on heating, producing strong acids and bases, causing fire and explosion hazard. Liquid attacks some plastics and rubber. Attacks many metals.

Waste Disposal

Wastewaters may be subjected to biological treatment. Concentrations may be further reduced by ozone treatment. High concentration wastes may be destroyed in special waste incinerators.

m-Cresol Preparation Products And Raw materials

Raw materials

Preparation Products


m-Cresol Suppliers

Global( 259)Suppliers
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m-Cresol Spectrum


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