Skip to Content
Merck

1.09613

Toluene-4-sulfonic acid monohydrate

for analysis EMSURE® ACS

Synonym(s):

Toluene-4-sulfonic acid monohydrate, p-Toluenesulfonic acid, Tosylic acid, Tosic acid, PTSA

Sign In to View Organizational & Contract Pricing.

Select a Size


About This Item

Empirical Formula (Hill Notation):
C7H8O3S · xH2O
CAS Number:
Molecular Weight:
172.20 (anhydrous basis)
UNSPSC Code:
12352106
EC Index Number:
203-180-0
NACRES:
NA.21
MDL number:
Assay:
≥99.0% anhydrous basis (acidimetric)
Grade:
ACS reagent
Form:
crystals
Solubility:
750 g/L
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

Product Name

Toluene-4-sulfonic acid monohydrate, for analysis EMSURE® ACS

SMILES string

[S](=O)(=O)([O-])c1ccc(cc1)C.[O+H3]

InChI

1S/C7H8O3S.H2O/c1-6-2-4-7(5-3-6)11(8,9)10;/h2-5H,1H3,(H,8,9,10);1H2

InChI key

KJIFKLIQANRMOU-UHFFFAOYSA-N

grade

ACS reagent

product line

EMSURE®

assay

≥99.0% anhydrous basis (acidimetric)

form

crystals

autoignition temp.

600 °C

potency

2570 mg/kg LD50, oral (Rat)

composition

Water, 9.5-11.5% Karl Fischer

impurities

≤0.1% Sulfated ash

pH

1 (20 °C, 650 g/L in H2O, anhydrous substance)

bp

140 °C/27 hPa

mp

56 °C (Elimination of water of crystallisation)

transition temp

flash point 180 °C

solubility

750 g/L

bulk density

510 kg/m3

anion traces

sulfate (SO42-): ≤0.3%

cation traces

Fe: ≤0.01%
Na: ≤0.002%
heavy metals (as Pb): ≤0.001%

storage temp.

15-25°C

Quality Level

Looking for similar products? Visit Product Comparison Guide

Related Categories

Analysis Note

Assay (acidimetric, calc. on anhydrous substance): ≥ 99.0 %
Identity: passes test
Appearance of solution: conforms
Sulphate (SO₄): ≤ 0.3 %
Heavy metals (as Pb): ≤ 0.001 %
Fe (Iron): ≤ 0.01 %
Na (Sodium): ≤ 0.002 %
TLC-Test: passes test
Sulfated ash: ≤ 0.1 %
Water (according to Karl Fischer): 9.5 - 11.5 %

Other Notes

Replaces: TX0770; TX0770-3

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

pictograms

CorrosionExclamation mark

signalword

Danger

Hazard Classifications

Aquatic Chronic 3 - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1C - STOT SE 3

target_organs

Respiratory system

Storage Class

8A - Combustible, corrosive hazardous materials

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service