Thiourea, UK source

[David Lingham]

I’m trying to find a supplier in the UK for Thiourea. In the past I have been able to buy direct from a couple of eBay sellers, but recently it appears to be unavailable.

 

[Keith Tapscott.]

I’m trying to find a supplier in the UK for Thiourea. In the past I have been able to buy direct from a couple of eBay sellers, but recently it appears to be unavailable.

I found this online David. Is this suitable for you?
Prices start at £23.90

https://www.sigmaaldrich.com/GB/en/product/sial/t8656?utm_source=google&utm_medium=organicshopping&utm_source=google&utm_medium=cpc&utm_campaign=20995169754&utm_content=161637261514&gclid=CjwKCAiA_5WvBhBAEiwAZtCU7w15wwRUVNOhehNju9p2Zs0xcPSBHQeDv1EGQ4NN2lcuCQn7q4xxvBoCGocQAvD_BwE

 

[David Lingham]

I found this online David. Is this suitable for you?
Prices start at £23.90

https://www.sigmaaldrich.com/GB/en/product/sial/t8656?utm_source=google&utm_medium=organicshopping&utm_source=google&utm_medium=cpc&utm_campaign=20995169754&utm_content=161637261514&gclid=CjwKCAiA_5WvBhBAEiwAZtCU7w15wwRUVNOhehNju9p2Zs0xcPSBHQeDv1EGQ4NN2lcuCQn7q4xxvBoCGocQAvD_BwE

Keith, thanks for that info. I did also find that myself and I believe it is shipped from India, and I’m a little doubtful of the source and purity.
David

 

[koraks]

I believe it is shipped from India

You'll find that many/most commodity chemicals are produced in Asia, and usually to the same specifications as Western production. I wouldn't hesitate purchasing Indian thiourea. My main concern with Sigma would be the hassle of ordering a small quantity there. Usually there's a retailer somewhere that's easier to use for a small order and/or private individual. Sorry, I don't know specific sources in the UK since I never shop there, but I imagine there must be equivalents to the channels I use here.

 

[laser]

Use extreme caution when handling. Tiny amounts can fog AgX. A darkroom contaminated with it may be nearly impossible to decontaminate.

 

[koraks]

Tiny amounts can fog AgX.

Yes, don't get it on film or paper, or in silver halide emulsions or the tools and ingredients used in making and processing them.

Having said that, I've extensively used thiourea (for sepia and gold toning), never took particular cautions except rinsing my tools/trays etc when I'm done and I've never ever run into a fogging problem because of it. A word of caution is in place, but there's no need for extreme concern. For instance, thiourea doesn't have the habit of vaporizing/offgassing, so it's easy to control.

 

[David Lingham]

Yes, don't get it on film or paper, or in silver halide emulsions or the tools and ingredients used in making and processing them.

Having said that, I've extensively used thiourea (for sepia and gold toning), never took particular cautions except rinsing my tools/trays etc when I'm done and I've never ever run into a fogging problem because of it. A word of caution is in place, but there's no need for extreme concern. For instance, thiourea doesn't have the habit of vaporizing/offgassing, so it's easy to control.

Thank you for the warning Koraks, I’ve been using Thiourea for sepia toning for a number of years and I have learned how to handle it. Strange that it’s become unavailable in the UK.

 

[koraks]

Yes, I'm surprised, too. It may have something to do with the suspicions of it being a carcinogen/mutagenic which might limit availability to private individuals. However, as a core building block in the chemical industry, there are tons of the stuff going about, also in the UK, so I'm confident that you'll tap into a supply for darkroom use.

 

[BobUK]

Sigma Aldrich will only sell to a genuine business address.

Atom Scientific Ltd | Product | Thiourea 98%

Atom Scientific is one of Europe\'s leading manufacturers of Diagnostic Life Science Reagents, servicing customers in over 40 countries, both direct and through regional distributors. We are committed to our motto of Simplicity for Science.

atomscientific.com

Atom Scientific (above link) are happy to sell to the public.

I have purchased quite a few photographic chemicals from them.

They are based in Hyde, Cheshire.

 

[Nicholas Lindan]

If finding a local source doesn't pan out*, try the Chinese - Alibaba & Co..

* Is the phrase "pan out" used in the UK? I've always assumed it originated with the California Gold Rush.

 

[David Lingham]

Sigma Aldrich will only sell to a genuine business address.

Atom Scientific Ltd | Product | Thiourea 98%

Atom Scientific is one of Europe\'s leading manufacturers of Diagnostic Life Science Reagents, servicing customers in over 40 countries, both direct and through regional distributors. We are committed to our motto of Simplicity for Science.

atomscientific.com

Atom Scientific (above link) are happy to sell to the public.

I have purchased quite a few photographic chemicals from them.

They are based in Hyde, Cheshire.

Thank you Bob

 

[David Lingham]

If finding a local source doesn't pan out*, try the Chinese - Alibaba & Co..

* Is the phrase "pan out" used in the UK? I've always assumed it originated with the California Gold Rush.

Thank you Nicholas, we do understand “pan out” this side of the pond.

 

[Mike Crawford]

Been getting it from Process Supplies for over 30 years!!
https://www.processuk.net/browse/cat740598_659670.aspx

 

[David Lingham]

Been getting it from Process Supplies for over 30 years!!
https://www.processuk.net/browse/cat740598_659670.aspx

Thank you Mike, forgot to check them!