Amidol is a colourless crystalline compound, C6H3(NH2)2OH·2HCl, used as a photographic developer. In Materials science, a crystal is a Solid in which the constituent Atoms Molecules or Ions are packed in a regularly ordered repeating In Film developing, photographic developer (or just developer) is a chemical that makes the Latent image on the film or print visible It was introduced as a developing agent for photographic papers in 1892. Photographic paper is paper coated with Light -sensitive chemicals used for making Photographic prints Photographic paper differs from photo papers Year 1892 ( MDCCCXCII) was a Leap year starting on Friday (link will display the full calendar of the Gregorian Calendar (or a Leap year It is unusual amongst developers as it works most effectively in slightly acid conditions rather than the strongly alkaline conditions required for most other developers. In Computer science, ACID ( Atomicity Consistency Isolation Durability) is a set of properties that guarantee that Database transactions are In Chemistry, an alkali (from Arabic: Al-Qaly القلي القالي) is a basic, ionic salt of an Alkali metal As Amidol ages it changes colour to a dark red-brown. Developing dishes and equipment used to prepare Amidol solutions are also frequently stained brown, a stain that is very persistent. A stain is a discoloration that can be clearly distinguished from the sufrace
Prints developed in Amidol are typically a very warm brown-black colour but overdevelopment can quickly lead to chemical fogging
Chemically, it is 2,4-diaminophenol dihydrochloride. Fogging in Photography is the deterioration in the quality of the image caused either by extraneous light or the effects of a processing Chemical. Its CAS number is [] and its SMILES structure is NC1=CC(N)=C(O)C=C1. CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to
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