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Buffer solution

(citric acid/sodium hydroxide/hydrogen chloride) colour: red traceable to SRM from NIST and PTB pH 4.00 (20 °C) Certipur®

Code: 1094750500
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(citric acid/sodium hydroxide/hydrogen chloride) colour: red traceable to SRM from NIST and PTB pH 4.00 (20 °C) Certipur®
Description
Catalogue Number 109475
Product Information
HS Code 3822 00 00
Physicochemical Information
Density 1.00 g/cm3 (20 °C)
pH value 4.0 (H₂O, 25 °C)
Safety Information according to GHS
Storage class 10 - 13 Other liquids and solids
WGK WGK 1 slightly water endangering
Disposal 28
Aqueous solutions: Container D.
Storage and Shipping Information
Storage Store at +15°C to +25°C.
Specifications
pH-value (20 °C) 3.99 - 4.01
Measured with a combined glass electrode after 5-point calibration according to DIN 19268 (expanded measurement uncertainty +/-0.01) with ref.buffer solutions according to DIN 19266, prepared with primary reference materials, at the accredited laboratory according to DIN EN ISO/IEC 17025.
Diviations of pH (Delta pH) at various temperatures:
 (0 °C) + 0.05
 (5 °C) + 0.04
 (10 °C) + 0.02
 (15 °C) + 0.01
 (20 °C) +/- 0
 (25 °C) + 0.01
 (30 °C) + 0.01
 (35 °C) + 0.01
 (40 °C) + 0.01
 (50 °C) +/- 0
Traceable to primary reference materials from:
NIST 189c, 188, 185h, 186 Ig, 186IIg, 187e
PTB OX-179/10,TA-212/11,PHT-232/12,PHO-243/12,BO-211/11
NIST: National Institute of Standards and Technology
PTB: Physikalisch-Technische Bundesanstalt
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