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Antibiotics and anti-infectives

Cefaclor

Also known as Cephaclor, Ceclor, Cefaclor anhydrous

CAS 53994-73-3Formula C15H14ClN3O4SMolar mass 367.81 g/molEC 258-909-5
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard 78 suppliers listed Drug substance
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Cefaclor chemical structure, C15H14ClN3O4S, CAS 53994-73-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
53994-73-3
Formula
C15H14ClN3O4S
Molar mass
367.81 g/mol
EC number
258-909-5
HS code
294190
Category
Antibiotics and anti-infectives

What is Cefaclor?

Plain description, key identifiers and synonyms

Cefaclor is a cephalosporin bearing chloro and (R)-2-amino-2-phenylacetamido groups at positions 3 and 7, respectively, of the cephem skeleton. It has a role as an antibacterial drug and a drug allergen.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(6R,7R)-7-[[(2R)-2-amino-2-phenylacetyl]amino]-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
CAS number
53994-73-3 CAS number cross-checkedOther or deprecated CAS: 143059-69-2, 70356-03-5
EC number
258-909-5
Molecular formula
C15H14ClN3O4S
UNII
3Z6FS3IK0K
MDL number
MFCD00151471
InChIKey
QYIYFLOTGYLRGG-GPCCPHFNSA-N
InChI
InChI=1S/C15H14ClN3O4S/c16-8-6-24-14-10(13(21)19(14)11(8)15(22)23)18-12(20)9(17)7-4-2-1-3-5-7/h1-5,9-10,14H,6,17H2,(H,18,20)(H,22,23)/t9-,10-,14-/m1/s1
Canonical SMILES
NC(C(=O)NC1C(=O)N2C(C(=O)O)=C(Cl)CSC12)c1ccccc1
Isomeric SMILES
C1C(=C(N2[C@H](S1)[C@@H](C2=O)NC(=O)[C@@H](C3=CC=CC=C3)N)C(=O)O)Cl

Synonyms

  • Cephaclor
  • Ceclor
  • Cefaclor anhydrous
  • Cefaclorum
  • Raniclor
  • Ceclor CD
  • 3-Chloro-7-D-(2-phenylglycinamido)-3-cephem-4-carboxylic acid
  • Lilly 99638
  • (6R,7R)-7-[[(2R)-2-amino-2-phenylacetyl]amino]-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
  • (6R,7R)-7-[(2R)-2-amino-2-phenylacetamido]-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
  • (6R,7R)-7-{[(2R)-2-amino-2-phenylacetyl]amino}-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
  • (6R,7R)-7-(((2R)-2-Amino-2-phenylacetyl)amino)-3-chloro-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid
  • 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-((aminophenylacetyl)amino)-3-chloro-8-oxo-, (6R-(6-alpha,7-beta(R*)))-
  • Keftid
  • Bacticlor mr
  • Distaclor mr
  • (6R,7R)-7-((2R)-2-amino-2-phenylacetamido)-3-chloro-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid
  • 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-((aminophenylacetyl)amino)-3-chloro-8-oxo-, monohydrate, (6R-(6alpha,7beta(R*)))-
  • (6R,7R)-7-((2R)-2-Amino-2-phenylacetylamino)-3-chloro-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid
  • Cefaclor Hydrate
  • Compound 99638
  • Distaclor
  • Kefral
  • Cefaclor Impurity C
  • (6R,7R)-7-((R)-2-amino-2-phenylacetamido)-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
Show all 35 synonyms
  • CCL
  • 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-[[(2R)-aminophenylacetyl]amino]-3-chloro-8-oxo-, (6R,7R)-
  • Alfacet
  • L-Kefral
  • Dystaclor MR
  • Alenfral (TN)
  • (6R,7R)-7-((R)-2-Amino-2-phenylacetamido)-3-chloro-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid
  • (6R,7R)-7-[[(2R)-2-amino-2-phenyl-acetyl]amino]-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
  • 7-((2R)-2-amino-2-phenylacetylamino)(7R,7aR)-3-chloro-6-oxo-2H,7H-azetidino[2, 1-b]1,3-thiazine-4-carboxylic acid
  • CefaclorImpurityC

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
367.81 g/molcalc.
Exact mass
367.0394 Dacalc.
LogP (octanol/water)
0.62calc.
Topological polar surface area
112.7 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
4calc.
Heavy atoms
24calc.
Rings
3calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.27calc.
Formal charge
0calc.
Stereocentres
3calc.
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(Cc1ccccc1)NC1C(=O)N2C=CCSC12

O=C(Cc1ccccc1)NC1C(=O)N2C=CCSC12

3 rings, 19 atoms.

98 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H317May cause an allergic skin reaction.
  • H334May cause allergy or asthma symptoms or breathing difficulties if inhaled.
Precautionary statements (15)
  • P233Keep container tightly closed.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P342 + P316If experiencing respiratory symptoms: Get emergency medical help immediately.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403Store in a well-ventilated place.
  • 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

Cefaclor suppliers

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Where suppliers are based

78 suppliers in 15 countries

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Cefaclor 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

Pharmacological actions

  • Anti-Bacterial Agents

Roles

  • aetiopathogenetic role
  • allergen
  • antibacterial agent
  • antibacterial drug
  • antiinfective agent
  • antimicrobial agent
  • antimicrobial drug
  • drug allergen
  • pharmaceutical

Pharmacology

Cefaclor anhydrous is a Cephalosporin Antibacterial.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • Active ingredient in FDA approved drug labels

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2941.90Indicative HS code

Antibiotics, other

World exports in 2024
$6.39B
+2.3% vs 2023, imports $6.97B
2019 to 2024
Top exporters
  1. China39.7%
  2. United States11.3%
  3. Switzerland * partner reported10.9%
Top importers
  1. Italy15.0%
  2. India * partner reported12.0%
  3. China8.7%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Cefaclor?

Cefaclor is a cephalosporin bearing chloro and (R)-2-amino-2-phenylacetamido groups at positions 3 and 7, respectively, of the cephem skeleton. It has a role as an antibacterial drug and a drug allergen.

What is the CAS number of Cefaclor?

The CAS registry number of Cefaclor is 53994-73-3. Other or deprecated CAS numbers: 143059-69-2, 70356-03-5.

What is the molecular formula and weight of Cefaclor?

The molecular formula of Cefaclor is C15H14ClN3O4S and its molar mass is 367.81 g/mol.

What is Cefaclor used for?

Known uses and roles of Cefaclor include antibacterials and antibiotics in pharmaceuticals, aetiopathogenetic role, allergen, antibacterial agent, antibacterial drug and 6 more.

Is Cefaclor hazardous?

Cefaclor carries the GHS signal word "Danger". Main hazards: may cause an allergic skin reaction, may cause allergy or asthma symptoms or breathing difficulties if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Cefaclor?

Cefaclor is usually classified under HS code 294190 (Antibiotics, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cefaclor?

CompoundList lists 78 suppliers of Cefaclor in United States, China, India, Germany and 11 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Cefaclor in India?

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

What is the price of Cefaclor?

Suppliers quote Cefaclor 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

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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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