Product FAQs

The Sig Nitrite® test is manufactured with 1 years Shelf-life from date of production.  We normally supply tests with at least 8 months remaining, please let us know at the time of your order if you require a longer Shelf-life and we will do our best to accommodate you. The Expiry date of the product is printed on the batch label of the tests.

The test can be stored for the duration of its shelf life at ambient temperature (in a range of about 2-25°C). Do not store frozen. If the appearance of the test has not changed after prolonged storage it should still be suitable for use even after it has exceeded its expiry date.

While the test typically takes up to 5 days for complete results, heavily contaminated samples can be detected overnight.

The Harmonized System (HS) is a standardized numerical method of classifying traded products. The HS assigns specific six-digit codes for varying classifications and commodities. Countries are allowed to add longer codes to the first six digits for further classification. It is used by countries around the world to uniformly identify and describe products for purposes such as assessing duties and gathering statistics.

The Sig Nitrite test is classified as: Prepared culture media for the development or maintenance of micro-organisms HS code for export from UK: 38.21.00.00 and HS code for import into the UK 38.21.00.00.00.

A positive result is identified by a change in colour from yellow/orange to bright pink in the test gel. Production of large gas bubbles causing gel ruptures also indicates the presence of nitrite reducing bacteria. The speed at which the colour change occurs indicates the severity of nitrite reducing bacteria contamination.

Yes, the Sig Nitrite® test kit provides a quick and user-friendly method that can be used on-site without the need for specialised training or equipment. This capability helps in avoiding delays associated with transferring samples to a laboratory, providing quicker results and cost savings.