Skip to Content
Merck
CN

Key Documents

View All Documentation

1.10107

Arsenazo III

metal indicator

Synonym(s):

Arsenazo III, 2,7-Bis(2-arsonophenylazo)-1,8-dihydroxynaphthaline-3,6-disulfonic acid

Sign In to View Organizational & Contract Pricing.

Select a Size

Change View

About This Item

Empirical Formula (Hill Notation):
C22H18As2N4O14S2
CAS Number:
1668-00-4
Molecular Weight:
776.37
UNSPSC Code:
12352103
EC Index Number:
216-788-6
NACRES:
NA.21
MDL number:
MFCD00036695
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

Product Name

Arsenazo III, metal indicator

Quality Level

200

form

solid

loss

≤10% loss on drying, 110°C

pH

2.3 (20 °C, 10 g/L in H2O)

bulk density

850 kg/m3

λmax

569-576 nm (buffer pH 10.0)

storage temp.

2-30°C

SMILES string

[As](=O)(O)(O)c1c(cccc1)N=Nc2c(c3c(cc2[S](=O)(=O)O)cc(c(c3O)N=Nc4c(cccc4)[As](=O)(O)O)[S](=O)(=O)O)O

InChI

1S/C22H18As2N4O14S2/c29-21-18-11(9-16(43(37,38)39)19(21)27-25-14-7-3-1-5-12(14)23(31,32)33)10-17(44(40,41)42)20(22(18)30)28-26-15-8-4-2-6-13(15)24(34,35)36/h1-10,29-30H,(H2,31,32,33)(H2,34,35,36)(H,37,38,39)(H,40,41,42)

InChI key

UQHVTNUJRKELCE-UHFFFAOYSA-N

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λmax. (buffer pH 10.0): 569 - 576 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.025 g/l; buffer pH 10.0; calculated on dried substance): 300 - 450
Loss on drying (110 °C): ≤ 10 %
Suitability as indicator: passes test

Still not finding the right product?

Explore all of our products under Arsenazo III

pictograms

Skull and crossbonesEnvironment
GHS06,GHS09

signalword

Danger

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1

wgk

WGK 3

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

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

Global Trade Item Number

SKUGTIN
110107000504022536121536