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7539-04-0

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7539-04-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7539-04-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,3 and 9 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 7539-04:
(6*7)+(5*5)+(4*3)+(3*9)+(2*0)+(1*4)=110
110 % 10 = 0
So 7539-04-0 is a valid CAS Registry Number.

7539-04-0Downstream Products

7539-04-0Relevant articles and documents

POLYTHIOL COMPOSITION FOR A PLASTIC OPTICAL LENS

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Paragraph 0061; 0062; 0067; 0068, (2020/01/14)

The embodiments relate to a polythiol composition for a plastic optical lens and a polythiourethane-based plastic optical lens prepared therefrom. In the embodiments, a first polythiol compound having an ester group and a mercapto group only as a hydrogen-bondable functional group and a second polythiol compound having an ester group and a hydrogen-bondable functional group other than a mercapto group are used in an appropriate amount. Thus, it is possible to control the viscosity of a polymerizable composition at the initial stage of polymerization at a low temperature of 5 to 15℃ and to stabilize the rate of increase in the viscosity of the composition and the reaction rate thereof, thereby preventing the generation of striae, bubbles, and the like. Further, various plastic lenses such as eyeglass lenses, camera lenses, and the like having excellent appearance characteristics (without striae and bubbles) and excellent optical characteristics can be obtained from the composition.

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