Cargille Labs

Services to the sciences since 1924

Cargille Labs Refractive Index Certified Water

NIST/ASME uses as the authority for the properties of water, the publication issued by IAPWS ( The International Association for the Properties of Water and Steam ). The IAPWS has published the "absolute" refractive index of water, that is relative to a vacuum. We have calculated its refractive index, relative to air, by dividing the Absolute Refractive Index of water by the Absolute Refractive Index of air ( references available ).

ACS Reagent Grade Water was measured for refractive index at 589.3 nm on a high precision Abbe type refractometer standardized with NIST traceable standards.

Temperature Degrees Celsius +/-0.01 Absolute Refractive Index of Water +/-0.00005 at 589.3 nm Refractive Index of Water relative to air at 589.3 nm Refractive Index of Water read by Cargille +/-0.00005 at 589.3 nm and 23 °C Brix Equivalent as per ICUMSA
20 1.33334 1.33297 1.33297 0.000
25 1.33285 1.33249 1.33249 0.000
30 1.33228 1.33193 1.33193 0.000
*Note refractive index of water at 589.3 nm +/-0.00005 is equivalent to 0.000 % Brix +/-0.035

Certified Water Price Schedule

Cat # 1/4 fl.oz. 12 x 1/4 fl.oz. 1 fl.oz. 12 x 1 fl.oz.
19400 $77.50 $70.00/ea $198.50 $180.25/ea

A Letter of Certification accompanies each bottle.

All prices are subject to change without notice. Please contact us to confirm prices.
Site Last Modified January 16, 2017
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Web Resources

[ FSU Microscopy Reference ]: Excellent site for information on light refraction, microscopy, microphotography...

[ Modern Microscopy ]: A periodic on-line journal devoted to the world of microscopy. Every issue we will present articles, interviews, book reviews and columns by some of the most experienced researchers in the field.

[ McCrone Institute ]: Illinois not-for-profit corporation devoted to applied microscopy...

[ McCrone UK Ltd ]: