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제품설명
Johnson® Litmus-Neutral (Book-type) Paper, for Simple Test of pH-Acidity & Alkalinity of a Solution with Certificate of Conformity, Color Change at Acidity (Purple → Red) & Alkalinity (Purple→ Blue) “리트머스-뉴트랄” 페이퍼, 용액의 pH 산성 & 알칼리성-겸용 간편시험지 / 연보라색, 산성일때는 Red(적색)로! 알칼리성일때는 Blue(청색)로 변색