A perspex box conaining plastic strips with indica

Made:
c. 1980
maker:
Merck and Company Incorporated

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A perspex box conaining plastic strips with indicator paper at the end . These precision indicators made by Merck & Co., Inc. range pH 2.5 - 4.5.

Details

Category:
Experimental Chemistry
Object Number:
2001-516
type:
ph paper
credit:
CHN Analysis