Silly question: Hydroquinine and Hydroquinone?

jay moussy

Member
Joined
Jun 10, 2019
Messages
1,314
Location
Eastern MA, USA
Format
Hybrid
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

Member
Joined
Feb 5, 2021
Messages
182
Location
Fort Worth
Format
Medium Format
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.
 

Donald Qualls

Subscriber
Joined
Jan 19, 2005
Messages
12,292
Location
North Carolina
Format
Multi Format
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.
 
OP
OP

jay moussy

Member
Joined
Jun 10, 2019
Messages
1,314
Location
Eastern MA, USA
Format
Hybrid
OP
OP

jay moussy

Member
Joined
Jun 10, 2019
Messages
1,314
Location
Eastern MA, USA
Format
Hybrid
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

Member
Joined
Sep 10, 2002
Messages
3,586
Location
Eugene, Oregon
Format
4x5 Format
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

Member
Joined
Apr 5, 2007
Messages
29,973
Location
Germany
Format
Multi Format
Two different, completely unrelated substances.

For basic difference look up Quinones and Quinine.


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

Donald Qualls

Subscriber
Joined
Jan 19, 2005
Messages
12,292
Location
North Carolina
Format
Multi Format
AgX said:
(As often in chemistry one letter makes the difference.)
Click to expand...

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

Moderator
Moderator
Joined
Apr 24, 2005
Messages
52,873
Location
Delta, BC Canada
Format
Medium Format
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

Member
Joined
Apr 5, 2007
Messages
29,973
Location
Germany
Format
Multi Format
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!
 
You must log in or register to reply here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…