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13331-72-1

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13331-72-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13331-72-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,3,3 and 1 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 13331-72:
(7*1)+(6*3)+(5*3)+(4*3)+(3*1)+(2*7)+(1*2)=71
71 % 10 = 1
So 13331-72-1 is a valid CAS Registry Number.

13331-72-1Relevant articles and documents

PRODUCTION OF OPHTHALMIC DEVICES BASED ON PHOTO-INDUCED STEP GROWTH POLYMERIZATION

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, (2011/11/12)

The invention provide a new lens curing method for making hydrogel contact lenses. The new lens curing method is based on actinically-induced step-growth polymerization. The invention also provides hydrogel contact lenses prepared from the method of the invention and fluid compositions for making hydrogel contact lenses based on the new lens curing method. In addition, the invention provide prepolymers capable of undergoing actinically-induced step-growth polymerization to form hydrogel contact lenses.

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