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Heterocyclic building blocks

ST 82

Also known as 3-Pyridinecarboxamide, 6-chloro-N-(tetrahydro-2-oxo-3-thienyl)-, 6-chloro-N-(2-oxothiolan-3-yl)pyridine-3-carboxamide, Homocysteine-thiolactone-6-chloronicotinamide

CAS 66608-10-4Formula C10H9ClN2O2SMolar mass 256.71 g/mol
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ST 82 chemical structure, C10H9ClN2O2S, CAS 66608-10-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
66608-10-4
Formula
C10H9ClN2O2S
Molar mass
256.71 g/mol
HS code
293499
Category
Heterocyclic building blocks

What is ST 82?

Plain description, key identifiers and synonyms

ST 82 is a chemical substance with the molecular formula C10H9ClN2O2S and a molar mass of 256.71 g/mol. Its CAS registry number is 66608-10-4. The IUPAC name is 6-chloro-N-(2-oxothiolan-3-yl)pyridine-3-carboxamide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
6-chloro-N-(2-oxothiolan-3-yl)pyridine-3-carboxamide
CAS number
66608-10-4 CAS number cross-checked
Molecular formula
C10H9ClN2O2S
InChIKey
WBFPIUYSKKXVFW-UHFFFAOYSA-N
InChI
InChI=1S/C10H9ClN2O2S/c11-8-2-1-6(5-12-8)9(14)13-7-3-4-16-10(7)15/h1-2,5,7H,3-4H2,(H,13,14)
SMILES (canonical and isomeric)
C1CSC(=O)C1NC(=O)C2=CN=C(C=C2)Cl

Synonyms

  • 3-Pyridinecarboxamide, 6-chloro-N-(tetrahydro-2-oxo-3-thienyl)-
  • 6-chloro-N-(2-oxothiolan-3-yl)pyridine-3-carboxamide
  • Homocysteine-thiolactone-6-chloronicotinamide
  • 6-Chloro-N-(2-oxothiolan-3-yl)pyridine-3-carboximidic acid

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
256.71 g/molcalc.
Exact mass
256.0073 Dacalc.
LogP (octanol/water)
1.5calc.
Topological polar surface area
59.06 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
2calc.
Heavy atoms
16calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.3calc.
Formal charge
0calc.
Stereocentres
1calc.
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, O=C(NC1CCSC1=O)c1cccnc1

O=C(NC1CCSC1=O)c1cccnc1

2 rings, 15 atoms, the Homocysteine-thiolactone-nicotinamide ring system.

4 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

ST 82 suppliers

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ST 82 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

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code ST 82 is traded under.

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for ST 82 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about ST 82, based on the data on this page

What is ST 82?

ST 82 is a chemical substance with the molecular formula C10H9ClN2O2S and a molar mass of 256.71 g/mol. Its CAS registry number is 66608-10-4. The IUPAC name is 6-chloro-N-(2-oxothiolan-3-yl)pyridine-3-carboxamide.

What is the CAS number of ST 82?

The CAS registry number of ST 82 is 66608-10-4.

What is the molecular formula and weight of ST 82?

The molecular formula of ST 82 is C10H9ClN2O2S and its molar mass is 256.71 g/mol.

What is ST 82 used for?

Known uses and roles of ST 82 include building blocks in research and laboratory and screening compounds in research and laboratory.

Is ST 82 hazardous?

No GHS hazard classification for ST 82 is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of ST 82?

ST 82 is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy ST 82?

Post a free request on CompoundList and suppliers of ST 82 will send you quotes. Your contact details stay private until you accept a quote.

What is the price of ST 82?

Suppliers quote ST 82 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 ST 82

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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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