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Heterocyclic building blocks

4-Methylthiazole

Also known as 4-Methyl-1,3-thiazole, Thiazole, 4-methyl-, 4-methyl thiazole

CAS 693-95-8Formula C4H5NSMolar mass 99.16 g/molEC 211-764-1
GHS signal word: Warning. Pictograms: Flammable, Harmful or irritant 21 suppliers listed
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4-Methylthiazole chemical structure, C4H5NS, CAS 693-95-8
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Liquid
Boiling point
132 °C
Density
1.112 @ 25 MM HG
Solubility
SOL IN WATER, ALCOHOL, ETHER
HS code
293410
Category
Heterocyclic building blocks
Illustrative photo, a closed 1000 litre IBC tote in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is 4-Methylthiazole?

Plain description, key identifiers and synonyms

4-methylthiazole is a 1,3-thiazole substituted by a methyl group at position 4. It has a role as a Maillard reaction product.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-methyl-1,3-thiazole
CAS number
693-95-8 CAS number cross-checked
EC number
211-764-1
Molecular formula
C4H5NS
UNII
X8S174990R
MDL number
MFCD00005340
InChIKey
QMHIMXFNBOYPND-UHFFFAOYSA-N
InChI
InChI=1S/C4H5NS/c1-4-2-6-3-5-4/h2-3H,1H3
SMILES (canonical and isomeric)
CC1=CSC=N1

Synonyms

  • 4-Methyl-1,3-thiazole
  • Thiazole, 4-methyl-
  • 4-methyl thiazole
  • 4-Methyl-Thiazole
  • 4-methyl-5H-1,3-thiazole
  • 4-methyithiazole
  • 4 -methyl-thiazole
  • methylthiazole, 4-
  • 4-Methylthiazole, 99%
  • 4-Methyl-1,3-thiazole #
  • 4-27-00-00969 (Beilstein Handbook Reference)
  • Qmhimxfnboypnd-uhfffaoysa-
  • 4-Methylthiazole, >=98%, FG
  • 4-Methylthiazole, analytical standard

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Liquidexp.
Odour
GREEN, NUTTY ODORexp.
Boiling point
132 °Cexp.
Density
1.112 @ 25 MM HGexp.
Solubility
SOL IN WATER, ALCOHOL, ETHERexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
99.16 g/molcalc.
Exact mass
99.0143 Dacalc.
LogP (octanol/water)
1.45calc.
Topological polar surface area
12.89 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.25calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1cscn1

c1cscn1

1 ring, 5 atoms, the Thiazole ring system.

16,016 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H226Flammable liquid and vapour.
  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
Precautionary statements (22)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

4-Methylthiazole suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 21 suppliers
21 of 21 offers

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Where suppliers are based

21 suppliers in 4 countries

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4-Methylthiazole price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Research chemical.

Chemical intermediate for 4-cyanothiazole.

Roles

  • Maillard reaction product
  • thermal degradation product

Functional uses

  • Flavouring and nutrient

How it is made

Probably by reaction of thioformamide with 1-chloropropanone

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 4-Methylthiazole is traded under.

HS 2934.10Indicative HS code

Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the…

World exports in 2024
$3.88B
−16.1% vs 2023, imports $3.12B
2019 to 2024
Top exporters
  1. Switzerland * partner reported36.4%
  2. Ireland28.8%
  3. China10.0%
Top importers
  1. Canada33.4%
  2. United States14.4%
  3. Ireland13.1%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for 4-Methylthiazole is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 4-Methylthiazole, based on the data on this page

What is 4-Methylthiazole?

4-methylthiazole is a 1,3-thiazole substituted by a methyl group at position 4. It has a role as a Maillard reaction product.

What is the CAS number of 4-Methylthiazole?

The CAS registry number of 4-Methylthiazole is 693-95-8.

What is the molecular formula and weight of 4-Methylthiazole?

The molecular formula of 4-Methylthiazole is C4H5NS and its molar mass is 99.16 g/mol.

What is 4-Methylthiazole used for?

Research chemical. Chemical intermediate for 4-cyanothiazole.

Is 4-Methylthiazole hazardous?

4-Methylthiazole carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour, harmful if swallowed, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 4-Methylthiazole?

4-Methylthiazole is usually classified under HS code 293410 (Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 4-Methylthiazole?

CompoundList lists 21 suppliers of 4-Methylthiazole in China, United States, Canada and India. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy 4-Methylthiazole in India?

1 supplier in India list 4-Methylthiazole on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of 4-Methylthiazole?

Suppliers quote 4-Methylthiazole on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle 4-Methylthiazole

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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