55-55-0 Usage
Description
Metol is contained in black-and-white film developers
and caused contact dermatitis in photographers.
Chemical Properties
White crystalline powder
Uses
Different sources of media describe the Uses of 55-55-0 differently. You can refer to the following data:
1. Photographic developer; dyeing furs.
2. Metol is a black-and-white photographic developer; dyeing furs; as pigment in hair dyes.
3. 4-(Methylamino)phenol sulfate is a photographic developer used in black and white photography. It is also used as tone developers in developing agents. Further, it is used in oxidative hair dye formulations.
4. 4-methylaminophenol sulfate is used as a photographic developer and
fur dye.
Definition
ChEBI: The sulfate salt of 4-methylaminophenol.
General Description
Off-white crystalline solid. Sensitive to light.
Air & Water Reactions
Water soluble.
Hazard
Eye and skin irritant.
Fire Hazard
Flash point data for 4-Methylaminophenol sulfate are not available but 4-Methylaminophenol sulfate is probably combustible.
Purification Methods
Crystallise this photographic developer from H2O (needles m 250-260o) (its solubility is 5% at 20o and 17% at 100o) or MeOH. It is used for determining Ag. [Palit et al. Indian J Chem, Sect B 28 64 1989.]
Check Digit Verification of cas no
The CAS Registry Mumber 55-55-0 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 5 and 5 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 55-55:
(4*5)+(3*5)+(2*5)+(1*5)=50
50 % 10 = 0
So 55-55-0 is a valid CAS Registry Number.
InChI:InChI=1/2C7H9NO.H2O4S/c2*1-8-6-2-4-7(9)5-3-6;1-5(2,3)4/h2*2-5,8-9H,1H3;(H2,1,2,3,4)/p-2
55-55-0Relevant articles and documents
A one-pot synthesis of metol sulphate employing phase-transfer catalysis
Nag, Ahindra,Sarkar, Samir K.,Palit, Sunanda K.,Pandey, Shakti
, p. 64 (2007/10/02)
A one-pot two-step synthesis of metol sulphate using phase transfer catalysis is reported.