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Anhydrid der 2-Acetoxy-5-chlor-benzoesaeure, also known as 2-acetoxy-5-chlorobenzoic anhydride, is a chemical compound with the molecular formula C10H5ClO5. It is a derivative of benzoic acid, featuring a chlorine atom at the 5th position and an acetoxy group at the 2nd position. This anhydride is a white crystalline solid and is used as an intermediate in the synthesis of various pharmaceuticals and agrochemicals. It is typically produced through the acetylation of 5-chlorosalicylic acid, followed by dehydration to form the anhydride. Due to its reactivity, it is important to handle Anhydrid der 2-Acetoxy-5-chlor-benzoesaeure with care, as it can undergo further chemical reactions, such as nucleophilic attacks, making it a versatile building block in organic synthesis.

1734-63-0

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1734-63-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1734-63-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,3 and 4 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1734-63:
(6*1)+(5*7)+(4*3)+(3*4)+(2*6)+(1*3)=80
80 % 10 = 0
So 1734-63-0 is a valid CAS Registry Number.

1734-63-0Downstream Products

1734-63-0Relevant academic research and scientific papers

Influence of impurities on the crystallisation of 5-X-aspirin and 5-X-aspirin anhydride polymorphs (X = Cl, Br, Me)

Solanko, Katarzyna A.,Bond., Andrew D.

experimental part, p. 6991 - 6996 (2012/05/31)

Crystallisation of 5-X-aspirin (X = Cl, Br) by ambient evaporation from organic solvents commonly yields a mixture of polymorphs I and II for X = Cl, but only polymorph I for X = Br. Addition of 5-X-aspirin anhydride (5-20 mol %) leads to sole production

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