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Screening compounds

Chlorin

Also known as 2,3-dihydroporphyrin, 2,3,22,24-tetrahydroporphyrin, 2,3-dihydro-21H,23H-porphine

CAS 2683-84-3Formula C20H16N4Molar mass 312.38 g/mol
1 supplier listed
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Chlorin chemical structure, C20H16N4, CAS 2683-84-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2683-84-3
Formula
C20H16N4
Molar mass
312.38 g/mol
HS code
293399
Category
Screening compounds

What is Chlorin?

Plain description, key identifiers and synonyms

Chlorin is a tetrapyrrole fundamental parent that is obtained by formal hydrogenation across the 2,3-double bond of porphyrin. It is a member of chlorins and a tetrapyrrole fundamental parent.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,3,22,24-tetrahydroporphyrin
CAS number
2683-84-3 CAS number cross-checked
Molecular formula
C20H16N4
InChIKey
UGADAJMDJZPKQX-UHFFFAOYSA-N
InChI
InChI=1S/C20H16N4/c1-2-14-10-16-5-6-18(23-16)12-20-8-7-19(24-20)11-17-4-3-15(22-17)9-13(1)21-14/h1-6,9-12,22-23H,7-8H2
SMILES (canonical and isomeric)
C1CC2=NC1=CC3=CC=C(N3)C=C4C=CC(=N4)C=C5C=CC(=C2)N5

Synonyms

  • 2,3-dihydroporphyrin
  • 2,3,22,24-tetrahydroporphyrin
  • 2,3-dihydro-21H,23H-porphine
  • a chlorin
  • 17,18-dihydroporphyrin
  • trans-17,18-dihydroporphyrin
  • 21H,23H-Porphine, 2,3-dihydro-
  • 7,8-Dihydro-21H,23H-porphine Dihydroporphine

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
312.38 g/molcalc.
Exact mass
312.1375 Dacalc.
LogP (octanol/water)
4.27calc.
Topological polar surface area
57.36 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
24calc.
Rings
5calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.1calc.
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, C1=Cc2cc3ccc(cc4nc(cc5ccc(cc1n2)[nH]5)CC4)[nH]3

C1=Cc2cc3ccc(cc4nc(cc5ccc(cc1n2)[nH]5)CC4)[nH]3

5 rings, 24 atoms. This chemical is the scaffold itself.

22 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.

Chlorin suppliers

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Where suppliers are based

1 supplier in 1 country

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Chlorin price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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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 Chlorin is traded under.

HS 2933.99Indicative HS code

Heterocyclic compounds with nitrogen hetero-atom(s) only, other

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Chlorin, based on the data on this page

What is Chlorin?

Chlorin is a tetrapyrrole fundamental parent that is obtained by formal hydrogenation across the 2,3-double bond of porphyrin. It is a member of chlorins and a tetrapyrrole fundamental parent.

What is the CAS number of Chlorin?

The CAS registry number of Chlorin is 2683-84-3.

What is the molecular formula and weight of Chlorin?

The molecular formula of Chlorin is C20H16N4 and its molar mass is 312.38 g/mol.

What is Chlorin used for?

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

Is Chlorin hazardous?

No GHS hazard classification for Chlorin 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 Chlorin?

Chlorin is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Chlorin?

CompoundList lists 1 supplier of Chlorin in India. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Chlorin in India?

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

What is the price of Chlorin?

Suppliers quote Chlorin 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 Chlorin

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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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