Agent Name

p-Methylaminophenol sulfate

Alternative Name

Metol

CAS Number

55-55-0

Formula

C7-H9-N-O.1/2H2-O4-S

Major Category

Nitrogen Compounds

Synonyms

Paramethylaminophenol sulfate; Phenol, 4-(methylamino)-, sulfate salt (2:1); 4-(Methylamino)phenol sulfate; 4-(Methylamino)phenol sulfate (2:1) salt; Armol; Elon (VAN); Elon (developer); Genol; Graphol; Metatyl; Methyl-p-aminophenol sulfate; Metol; N-Methyl-4-hydroxyaniline hemisulfate; N-Methyl-p-aminophenol sulfate; Phenol, p-(methylamino)-, sulfate (2:1) (salt); Phenol, p-methylamino-, sulfate (salt); Photol; Pictol; Planetol; Rhodol; Rhodol (VAN); Verol; p-Methylaminophenol sulfate (VAN); p-Methylaminophenol sulphate (2:1); p-Methylaminophenolsulfate; Bis(4-hydroxy-N-methylanilinium) sulphate; Phenol, 4-(methylamino)-, sulfate (2:1); Phenol, 4-(methylamino)-, sulfate (2:1) (salt); [ChemIDplus] Monomethyl-p-aminopheol sulfate; p-Hydroxymethylaniline sulfate; Photo-Rex; [Merck Index] UN3077

Category

Amino Phenols

Description

Off-white crystalline solid; [CAMEO] White to beige odorless solid; [EC] Beige crystalline solid; [Aldrich MSDS]

Sources/Uses

Used to develop black-and-white photographs; [Kanerva, p. 1816] Used as photographic developer and to dye furs; [Merck Index] Used in oxidative hair dyes; [EC]

Comments

Allergic contact dermatitis in photographers; [Marks] An eye, respiratory tract, and mild skin irritant; A skin sensitizer; May have effects on the blood; [ICSC] Toxic by ingestion: nausea, weakness, cyanosis, vertigo, headache, and convulsions; [CAMEO] Causes somnolence, tremor, and changes in urine composition in oral lethal-dose studies of mice; Causes acute tubular necrosis and increased spleen weights in repeated, oral-dose studies of rats; [RTECS] 3% solution is not irritating to skin and mildly irritating to eyes; [ToxPlanet: EC] See "N-Methyl-4-aminophenol."

Exposure Assessment
Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Environmentally hazardous substances, solid, n.o.s."

Adverse Effects
Skin Sensitizer

Yes

Links to Other NLM Databases
Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: