Ideal for use in genetics education. These Thiourea paper strips are perceived as either sweet, salty, bitter or tasteless depending on the taster's genetics. Simply touch the strip to the user's tongue and record the results; do not eat.

When choosing between taste test strips, thiourea and PTC are quite similar, as they are typically perceived as either bitter or tasteless. However, PTC has been far more extensively studied, which is why most customers choose this option. While thiourea and PTC both produce a bitter taste, the ability to taste one does not necessarily mean an individual will be able to taste the other, and vice versa.

Pack of 100 strips.

Mainland Britain

Our UK mainland delivery charges are as follows: (All figures are exc. VAT)

For next day delivery, please order by 1pm, item must be in stock. All stock levels are shown on the web, if showing as out of stock or prepared to order and required urgently, please contact us as we may have stock! Next day orders are sent by Royal Mail Special Delivery which is a signed for service, please ensure someone is available.

Drosophila are always dispatched on a Monday, please advise when ordering your preferred delivery week.

Our working hours are 9am - 3pm Monday - Thursday, 9am - 12pm Friday. Orders received outside these hours will be processed the next working day; orders are only dispatched Monday-Thursday (Monday-Wednesday for perishable items). Hours vary during school holidays but we are usually available via email.

*Half term closure 16th & 17th February 2026*

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Northern Ireland

Sadly, due to the UK leaving the EU, we can no longer supply Northern Irish customers with any products the have codes starting with an 'L' or 'P'. This is due to the requirement for all live or preserved products to have an import licence specific to the customer purchasing and the product being purchased. As each licence takes 2 weeks to obtain, and involves a considerable amount of paperwork, we have made the difficult decision to stop offering these products to Northern Irish customers. We can still offer equipment, i.e. products with an 'E' code, as these simply require customs documentation.

We apologise for the inconvenience and if the legislation changes we will review our decision.

British Islands

Delivery charges to the Isle of Man, Channel Islands (including Jersey & Guernsey), Shetland, Orkney and all the other islands we've missed, are the same as to mainland Britain (see above). The main difference is that delivery is likely to take a little longer, and for this reason we cannot guarantee next day delivery.

In addition, we cannot ship any liquids, so any 'wet' specimen ordered will be sent vacuum packed rather than in a jar.

International Orders

We welcome international orders but please note only non-perishable and non-animal derivative items, i.e. only those with codes starting with an 'E', can be sent.

Buyer is responsible for all import duties and taxes. EU businesses need to supply an EORI number before we can ship.

EU Delivery: £28

If you wish to buy something very small/lightweight, or need urgent delivery, please contact us for a postage quote, otherwise standard charges apply.

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