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Cefaclor Monohydrate
(CAS RN:70356-03-5 Product Number:C3478)



General Information

Product Number C3478

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Purity/Analysis Method >98.0%(HPLC)(T)
Storage Temperature <0°C
M.F. / M.W. C15H14ClN3O4S·H2O=367.80(as Anhydrous)
CAS RN 70356-03-5
Related CAS RN
MDL Number MFCD00071999
Packaging and Container
  • Product Details
  • Safety & Regulations


Purity(HPLC) min. 98.0 area%
Purity(Nonaqueous Titration) min. 98.0 %
Specific rotation [a]20/D +100 to +115 deg(C=0.4, water)
Water 4.5 to 5.5 %


Merck Index(14) 1912
RTECS# XI0365000


Signal Word Danger
Hazard Statements
  • H317
  • :May cause an allergic skin reaction.
  • H334
  • :May cause allergy or asthma symptoms or breathing difficulties if inhaled.
Precautionary Statements
  • P261
  • :Avoid breathing dust/fume/gas/mist/vapours/spray.
  • P272
  • :Contaminated work clothing should not be allowed out of the workplace.
  • P280
  • :Wear protective gloves.
  • P284
  • :Wear respiratory protection.
  • P302+P352+P333+P313+P362+P364
  • :IF ON SKIN: Wash with plenty of soap and water. If skin irritation or rash occurs: Take off contaminated clothing. And wash it before reuse.
  • P304+P340+P342+P311
  • :IF INHALED: Remove person to fresh air and keep comfortable for breathing. If experiencing respiratory symptoms: Call a POISON CENTER or doctor.

Transport Information

HS Number 2941900000


Cefaclor: A Second Generation Semisynthetic Cephalosporin Antibiotics with 3-Chloro Group

Cefaclor is a second generation semisynthetic cephalosporin antibiotics which possesses a chemical structure substituted with chloro group for the 3-methyl group present in cephalexin [C2248] molecule. Cefaclor is active against a wide range of commonly encountered bacterial pathogens, acting by inhibiting cell wall synthesis. The antibiotic activities against Gram-positive and Gram-negative bacterial pathogens are several times more than that of cephalexin.


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