Spectrophotometric Standards Specialists

In-Spec® Visible Standards


The In-Spec® Visible Standards are designed for use in the visible range of the spectrum. With 6 different stock solutions of varying concentrations you should be able to find a solution that is close to the values that you see from your samples. If you need more exact values we can usually create a custom solution to your specifications. Please see our Custom Standards page for more information.


  • Accurate
  • NIST Traceable
  • Stable - a consistent suspension
  • Easy-to-use - No Mixing and no dilution required
  • Flexible - Use at multiple wavelengths specific to your current testing
  • Non-Toxic - No concerns over handling, liability, storage and disposal

-Basics of In-Spec-


Please note that the values in the table are representative values only and are to assist in picking out the appropriate standard for your application. The actual value of the lot you receive may vary. The data provided is representative of a 10mm pathlength cell. Data for additional wavelengths and pathlengths are available. 


In-spec Visible® Standards
The In-Spec® visible standards are designed to check the photometric accuracy of a traditional spectrophotometer from 350nm up to 850nm.

Available as sealed quartz cuvettes or bottles (60mL, 125mL, 250mL, 500mL, 1L,)

ISO 9001 Certified

ISO/IEC 17025 Accreditated

APHA/Platinum-Cobalt Color Standards Added to the In-Spec® Product Line 

Download the new In-Spec Catalog. More>>

EPA rule for SUVA for TOC analysis More >>

Order In-Spec® products online. We now offer several ways to order In-Spec® products for your convenience. More >>

FREE SAMPLE! See for yourself how much better In-Spec® is. More >>

In-Spec® is owned and operated by:
GFS Chemicals, Inc.
Visit the GFS Web site for more information.


How to Buy / Contact Us
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