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Arsenazo III

metal indicator

Synonym(s):

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

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About This Item

Empirical Formula (Hill Notation):
C22H18As2N4O14S2
CAS Number:
Molecular Weight:
776.37
MDL number:
UNSPSC Code:
12352103
EC Index Number:
216-788-6
NACRES:
NA.21

product name

Arsenazo III, metal indicator

Quality Level

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

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

Pictograms

Skull and crossbonesEnvironment

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Storage Class Code

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

WGK

WGK 3


Certificates of Analysis (COA)

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