Organic Impurities Test Set

Organic Impurities Test Set

Organic Impurities Test Set

Model: HM-137
Price: $340.00
Organic Impurities Test Set w/o Sodium Hydroxide Reagent

Organic Impurities Test Set w/o Sodium Hydroxide Reagent

Model: HM-137F
Price: $335.50

Deleterious organic materials in fine aggregates can be easily detected with the Organic Impurities Test, a simple, widely-used test. Samples are mixed in a special graduated colorless glass bottle with a 3% sodium hydroxide solution, then allowed to stand for 24 hours. If the color of the supernatant liquid above the test sample is darker than a standard reference color, organic compounds may be present and further testing should be done before approval.

HM-137 Gilson Organic Impurities Test Set includes six 8oz (240ml) graduated Impurities Test Bottles w/ lids, 1lb (454g) of Sodium Hydroxide (NaOH) Pellets and a circular Color Reference Disk with five reference colors. The sodium hydroxide pellets make enough 3% solution to perform over 150 tests. For areas with shipping restrictions, this set is available without sodium hydroxide as HM-137F. For strict compliance to ASTM and AASHTO Standards, HM-818 Reagent Grade Sodium Hydroxide Pellets can be ordered separately. Impurities Test Bottles are graduated in oz and ml measurements and have watertight screw-on caps. All individual set components can also be purchased separately.

HM-815 Color Reference Disk comes with five permanent, fade-free solid-glass reference colors of 5, 8, 11, 14 and 16 on the Gardner color scale mounted in a protective plastic frame. Individual Gardner Liquid Color Standards are alternately available for the same reference colors and also meet ASTM/AASHTO requirements.


  • Meets ASTM and AASHTO standards
  • Sets are available with or without sodium hydroxide pellets
  • Contains the components needed to perform Organic Impurities Test
  • Includes enough pellets to complete at least 150 tests

Included Items:

  • Organic Impurities Test Set, with or without Sodium Hydroxide Pellets


Estimated Shipping Weight

HM-137: 6.0lbs (2.72kg)

HM-137F: 4.0lbs (1.81kg)

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Estimated Shipping Weight

HM-137: 6.0lbs (2.72kg)

HM-137F: 4.0lbs (1.81kg)

Meets Standard(s):
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