Gentaur pH 9.21 Buffer Solution at 25°C in Twin Neck - 1l
https://www.ecbol.org/shop/fm-07-10921125tt-gentaur-ph-9-21-buffer-solution-at-25degc-in-twin-neck-1l-32326
https://www.ecbol.org/web/image/product.template/32326/image_1920?unique=f12b1fb
pH 9.21 buffer, 1L twin neck bottle, stable and reliable for lab calibration at 25°C.
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