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Gentaur Buffer Standard pH 4.00 at 25°C Colour Coded ISO 17034 Certified Reference Material - 500ml

http://www.cosmoscience.org/web/image/product.template/16710/image_1920?unique=765a6f2
Same as above but with colour coding for easy identification; smaller volume. Certified for precise pH calibration at pH 4.00 and 25°C.

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