Silly question: Hydroquinine and Hydroquinone?

[jay moussy]

Are they the same thing?
I wanted to look up the photo developer one, "hydroquinine" (toxicity, etc.), but somehow a search led me to "hydroquinone".

The forum here seems to refer to the __quinine version.

Wikipedia has the ___quinone as "a major component in most black and white photographic developers for film and paper where, with the compound metol, it reduces silver halides to elemental silver."


Are we wrongly using "hydroquinine" instead of "hydroquinone"?

 

[Danner]

Hydroquinone is one example of a dihydroxybenzene, useful for development (disassociation of silver halides into elemental silver). And I think you are correct, it should be referred to as hydroquinone, generally.

 

[dE fENDER]

Are they the same thing?

No, I'ts different compounds. Hydroquinine - quinine modification,

https://www.sigmaaldrich.com/catalog/product/aldrich/337714?lang=en&region=RU

 

[Donald Qualls]

One will ameliorate your malaria, the other will develop your film. Do not interchange; hydroquinone is toxic and hydroquinine isn't superadditive with metol or phenidone.

 

[jay moussy]

No, I'ts different compounds. Hydroquinine - quinine modification,

https://www.sigmaaldrich.com/catalog/product/aldrich/337714?lang=en&region=RU

An aside: funny that this page is from "Millipore Sigma", I guess a small specialized segment of my former employer, Millipore, now dissolved through acquisitions. Merck must have grabbed some useful life science bits? Working with science folks was the best, even at my very low level. Money wasn't bad either.

 

[jay moussy]

I rechecked, "Hydroquinine" is found on a number of posts about developers, on the forum... without anybody making note of it, it seems.

 

[Doremus Scudder]

Mentions of "hydroquinine" on this and other forums as a developing agent is almost certainly an error. Hydroquinone is the common developing agent.

Doremus

 

[AgX]

Two different, completely unrelated substances.

For basic difference look up Quinones and Quinine.


(As often in chemistry one letter makes the difference.)

 

[Donald Qualls]

(As often in chemistry one letter makes the difference.)

Virtually always. Just for another photographic example -- cyanotype made with ferrOcyanide is the exact opposite of the more common variety with ferrIcyanide. The latter gives a negative image, dark when light hits it -- the former a direct positive, dark when it doesn't get light.

 

[MattKing]

There are some chemical names that differ slightly depending on location.
Aluminium/aluminum comes to mind.
And of course most substances have different names in different languages.

 

[AgX]

There are even same names that have different meanings in different languages.

Let alone the pet-fault of translators: the number billion



Thus we always must be alert!

 

[grat]

Thus we always must be alert!

The world needs more lerts.

 

[Danner]

Now let's talk about "hypo" versus "rapid fixer".