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69749

Metol

ACS reagent, for spectrophotometric det. of inorganic phosphate, ≥99.0%

Synonym(s):

4-(Methylamino)phenol hemisulfate salt, Metol

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About This Item

Linear Formula:
C7H9NO · 1/2H2SO4
CAS Number:
55-55-0
Molecular Weight:
172.19
UNSPSC Code:
12164500
NACRES:
NA.21
PubChem Substance ID:
329761925
EC Number:
200-237-1
Beilstein/REAXYS Number:
3919382
MDL number:
MFCD00013140
Assay:
≥99.0% (NT), ≥99.0%
Form:
crystals
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grade

ACS reagent

Quality Segment

100

assay

≥99.0% (NT), ≥99.0%

form

crystals

autoignition temp.

989 °F

quality

for spectrophotometric det. of inorganic phosphate

technique(s)

UV/Vis spectroscopy: suitable

ign. residue

≤0.1%

mp

260 °C (dec.) (lit.)

solubility

H2O: 50 mg/mL, clear

application(s)

general analytical

SMILES string

OS(O)(=O)=O.CNc1ccc(O)cc1.CNc2ccc(O)cc2

InChI

1S/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)

InChI key

ZVNPWFOVUDMGRP-UHFFFAOYSA-N

General description

Metol (4-methylaminophenol sulphate) is white crystalline which helps in determination of phosphate by reduction reaction of phosphomolybdic acid to molybdenum blue with intense colour. It is used as reducing agent. A solution of Metol could be prepared by dissolving a known amount in water with hydrated sodium sulphite along with which few drops of Brij needs to be added.

Legal Information

signalword

Warning

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Skin Sens. 1 - STOT RE 2

Storage Class

13 - Non Combustible Solids

wgk

WGK 3

flash_point_f

494.6 °F - closed cup

flash_point_c

257 °C - closed cup

ppe

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

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