Formaldehyde Chemical Test Kit Replacement Reagents (110 tests) - HI3838-100

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Formaldehyde Chemical Test Kit Replacement Reagents (110 tests) - HI3838-100


The HI3838-100 are reagents for the determination of formaldehyde by titration with the formaldehyde chemical test kit. There are enough reagents for approximately 110 tests to be used with Hanna’s test kit. These high quality reagents are manufactured in our state-of-the-art facility and are clearly marked with the lot number and expiration date on each packet for traceability.

Pre-made reagents for ease of use

Prepared with high purity chemicals

Marked with expiration date and lot number for traceability


The HI3838-100 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate formaldehyde measurements with the chemical test kit. These reagents follow the Alizarin Yellow R method to determine formaldehyde concentration.

For formaldehyde determination, dilute hydrochloric acid is used as the titrant. Alizarin Yellow R reagent is used to form a red-orange color complex for visual indication. Sodium sulfite reagent is used to form an alkaline formaldehyde product. Dropwise addition of the acidic titrant causes the solution to turn from red-orange to yellow as it reaches the Alizarin Yellow R endpoint. The number of milliliters of titrant used to reach the endpoint will determine the formaldehyde concentration as mg/L CH2O. These reagents are designed to be used with samples that have an expected formaldehyde range of 0.0 to 1.0 % and 0 to 10% Formaldehyde (CH2O).

Package bottles
Quantity 110 tests
Method Alizarin Yellow R