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Heterocyclic compounds

Heme b

Also known as heme, protoheme, Haem

Formula C34H32FeN4O4Molar mass 616.50 g/mol
1 supplier listed
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Heme b chemical structure, C34H32FeN4O4
2D chemical structure

Key facts

What buyers check first

All properties
Formula
C34H32FeN4O4
Molar mass
616.50 g/mol
HS code
293399
Category
Heterocyclic compounds

What is Heme b?

Plain description, key identifiers and synonyms

Heme b is a metalloprotoporphyrin in which the four pyrrole nitrogens of the protoporphyrin moiety are coordinated to iron. It is the most abundant of the heme compounds. It is a heme and a metalloprotoporphyrin.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3-[18-(2-carboxyethyl)-8,13-bis(ethenyl)-3,7,12,17-tetramethylporphyrin-21,23-diid-2-yl]propanoic acid, iron(2+)
Molecular formula
C34H32FeN4O4
InChI
InChI=1S/C34H34N4O4.Fe/c1-7-21-17(3)25-13-26-19(5)23(9-11-33(39)40)31(37-26)16-32-24(10-12-34(41)42)20(6)28(38-32)15-30-22(8-2)18(4)27(36-30)14-29(21)35-25;/h7-8,13-16H,1-2,9-12H2,3-6H3,(H4,35,36,37,38,39,40,41,42);/q;+2/p-2
SMILES (canonical and isomeric)
CC1=C(C2=CC3=NC(=CC4=C(C(=C([N-]4)C=C5C(=C(C(=N5)C=C1[N-]2)C)C=C)C)C=C)C(=C3CCC(=O)O)C)CCC(=O)O.[Fe+2]

Synonyms

  • heme
  • protoheme
  • Haem
  • protoheme IX
  • Ferroprotoporphyrin IX
  • (protoporphyrinato)iron
  • protoporphyrin ix containing fe
  • haem b
  • (7,12-diethenyl-3,8,13,17-tetramethylporphyrin-2,18-dipropanoato)iron
  • [3,7,12,17-tetramethyl-8,13-divinylporphyrin-2,18-dipropanoato(2-)]iron
  • [2,18-Bis(2-carboxyethyl)-7,12-diethenyl-3,8,13,17-tetramethylporphine-21,23-diido-kappa~4~N~21~,N~22~,N~23~,N~24~]iron

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
616.50 g/molcalc.
Exact mass
616.1773 Dacalc.
LogP (octanol/water)
6.76calc.
Topological polar surface area
128.6 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
8calc.
Heavy atoms
43calc.
Rings
5calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.24calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
Lipinski rule of five
Fails (2 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)C=C4)[nH]3

C1=Cc2cc3ccc(cc4nc(cc5ccc(cc1n2)[nH]5)C=C4)[nH]3

5 rings, 24 atoms, the 21H,22H-Porphine ring system.

144 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.

Heme b suppliers

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

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  • Shenghe Chemical
    China, JinanUnclaimed profile
    Heme bGrade, purity and minimum order on request
    Price on request
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Where suppliers are based

1 supplier in 1 country

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Heme b price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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 Heme b 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 Heme b is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Heme b, based on the data on this page

What is Heme b?

Heme b is a metalloprotoporphyrin in which the four pyrrole nitrogens of the protoporphyrin moiety are coordinated to iron. It is the most abundant of the heme compounds. It is a heme and a metalloprotoporphyrin.

What is the molecular formula and weight of Heme b?

The molecular formula of Heme b is C34H32FeN4O4 and its molar mass is 616.50 g/mol.

Is Heme b hazardous?

No GHS hazard classification for Heme b 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 Heme b?

Heme b 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 Heme b?

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

What is the price of Heme b?

Suppliers quote Heme b 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 Heme b

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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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