Cargille Labs

Services to the sciences since 1924

Cargille Master Calibration Liquids

Cargille Master Calibration Liquids are very stable, non-toxic liquids with refractive index measured to an accuracy of +/-0.00005 at various temperatures and wavelengths. The unusually high accuracy of these refractive index measurements will often require that the user knows his or her working temperature with an accuracy of +/- 0.02° C or better; this is because liquids typically have a temperature coefficient of -0.0004 refractive index units per 1°C so they will be affected by approximately 0.000008 refractive index units for each 0.02°C difference in temperature.

When the Master Calibration Liquid has refractive index measurements at two temperatures, 20° C or less apart, the user can compute a temperature coefficient and calculate (interpolate) refractive index at any in between temperature with an accuracy of at least +/- 0.00006 (the relationship of refractive index to temperature is nearly linear). Typical temperature coefficients (accurate to +/- 10%) are available from Cargille Laboratories and can, in practice, be used to correct for up to a known temperature change of 0.20°C from temperature of calibration. All measurements are NIST (NBS) traceable. All measurements available are listed here. Note: Å=Angstrom units.

Cargille Master Calibration Liquids are excellent for calibrating and verifying the following refractometers:

Mettler Toledo Models Rudolph Models Index Instruments Models
RE50 J157 TCR 15-30
RE40 J257 PTR 2X
PTR 46X

Leica Models

Reichert Models
10500B AR700
10501B AR600
  AR400

And other highly accurate temperature controlled refractometers


Note: Catalog Number 19250 is no longer available.

Cat. No. Master Calibration Liquids Nominal nD Actual Reading Lot No.

19252 Code S50 1.402 1.40235 @25°C at 5893 Å 072681

19253 Code S50 1.404 1.40427 @20°C at 5893 Å 082581

19255 Code 06 1.457 1.45746 @25°C at 5893 Å 121681

19257 Code 06 1.459 1.45932 @20°C at 5893 Å 120981

19259 Code 1160 1.490 1.48989 @20°C at 5893 Å 072176

19261 Code 1160 1.514 1.51432 @25°C at 5893 Å 100977

19264 Code 1057 1.572 1.57230 @25°C at 5893 Å 030374

19268 Code 63 1.630 1.63039 @25°C at 5893 Å 122381

19300 Code S1050 1.436 1.43604 @30°C at 5893 Å 022772

*19340 Code 1160 1.516 *1.5163 @20°C at 5893 Å 051582
* +/- 0.0001

Price Per Bottle
1 x 1/4 fl.oz
1 x 7.4 mL
12 x 1/4 fl.oz.
12 x 7.4 mL
1 x 1 fl.oz.
1 x 30 mL
12 x 1 fl.oz.
12 x 30 mL
$77.50 $70.00/ea. $198.50 $180.75/ea.

All prices are subject to change without notice. Please contact us to confirm prices.
Site Last Modified January 16, 2017
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All trademarks and trade names are the property of their respective owners.

Telephone: (973)-239-6633

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