18959-91-6 Usage
General Description
1,2-Benzenedicarboxylic acid, 4,4'-[1,3-phenylenebis(oxy)]bis-, commonly known as bis(2-ethylhexyl) phthalate, is a chemical compound used primarily as a plasticizer in manufacturing products such as PVC, vinyl flooring, and medical devices. It is a clear, colorless, and odorless liquid that is not easily evaporated. This chemical has been linked to potential health risks, including reproductive and developmental toxicity, making it a subject of concern and regulatory scrutiny. Efforts are being made to find alternative plasticizers that are safer for human health and the environment.
Check Digit Verification of cas no
The CAS Registry Mumber 18959-91-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,9,5 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 18959-91:
(7*1)+(6*8)+(5*9)+(4*5)+(3*9)+(2*9)+(1*1)=166
166 % 10 = 6
So 18959-91-6 is a valid CAS Registry Number.
18959-91-6Relevant articles and documents
METHODS OF MANUFACTURE OF DIANHYDRIDES
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, (2021/12/31)
A method of making dianhydride includes contacting a N-Substituted diimide with a carboxylic acid and substituted or unsubstituted dimethyl sulfoxide in an aqueous medium to provide a reaction mixture including tetra acid, triacid, imide diacid and diimide along with substituted or unsubstituted acetic acid, dimethyl sulfoxide and their derivatives. The method includes the isolation of tetra acid by precipitation in water followed by centrifuge or filtration. The tetra acid is converted into the corresponding dianhydride. The dianhydride prepared by the method are also described as precursor to make polyetherimide.
