Caronic Anhydride CAS 67911-21-1 PF-07321332 Boceprevir Intermediate High Quality

Short Description:

Chemical Name: Caronic Anhydride 

CAS: 67911-21-1

Appearance: White or Almost White Crystal Powder

Purity: >98.0% (GC)

Intermediate of PF-07321332 Paxlovid (CAS 2628280-40-8) and Boceprevir (CAS 394730-60-0)

High Quality, Commercial Production


Product Detail

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Chemical Properties:

Chemical Name Caronic Anhydride
Synonyms 6,6-Dimethyl-3-oxabicyclo[3.1.0]hexane-2,4-dione; 3,3-Dimethyl-1,2-cyclopropanedicarboxylic Anhydride
CAS Number 67911-21-1
CAT Number RF-PI315
Stock Status In Stock, Production Scale Up to Tons Every Month
Molecular Formula C7H8O3
Molecular Weight 140.14 
Melting Point 53.0~57.0℃
Boiling Point 246°C
Flashing Point 113°C
Density 1.274 g/mL at 25°C
Solubility Soluble in Methanol
Storage and Sensitivity Moisture Sensitive. Store Under Nitrogen. Ambient Temperatures.
Brand Ruifu Chemical


Item Specifications
Appearance White or Almost White Crystal Powder
Loss on Drying ≤0.50%
Residue on Ignition ≤0.20%
Single Impurity ≤0.50%
Total Impurities ≤2.0%
Purity / Analysis Method ≥98.0% (GC)
Heavy Metals (Pb) ≤20ppm
Test Standard Enterprise Standard
Usage Intermediate of PF-07321332 Paxlovid (CAS 2628280-40-8) and Boceprevir (CAS 394730-60-0)

Package & Storage:

Package: Bottle, Aluminum foil bag, Cardboard drum, 25kg/Drum, or according to customer's requirement.

Storage Condition: Store in sealed containers at cool and dry place; Protect from light, moisture and pest infestation.





Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer and supplier of Caronic Anhydride (CAS: 67911-21-1) with high quality, widely used in organic synthesis, synthesis of pharmaceutical intermediates and Active Pharmaceutical Ingredient (API) synthesis. Caronic Anhydride is the key intermediate of PF-07321332 Paxlovid (CAS 2628280-40-8) and Boceprevir (CAS 394730-60-0). PF-07321332 is a potent and orally active SARS-CoV 3C-like protease (3CLPRO) inhibitor developed by Pfizer. PF-07321332 targets to the SARS-CoV-2 virus and can be used for COVID-19 reseacrch. Boceprevir is an NS3 serine protease inhibitor of hepatitis C virus, for the treatment of HCV infection.

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