1668-00-4

1668-00-4 structure

Name: Arsenazo III
Chemical Name: arsenazo iii sodium salt
CAS Number: 1668-00-4
Molecular Formula: C₂₂H₁₈As₂N₄O₁₄S₂
Molecular Weight: 776.370
Catalog: Biochemical Biochemical reagent Acid-base indicator
Create Date: 2018-03-19 08:00:00
Modify Date: 2025-08-20 07:24:29
Arsenazo III is a dye useful for detection of micromolar concentrations of ionized Ca2+. Arsenazo III can be used for determination of thorium, zirconium, uranium and rare earth elements[1][2].

Name	arsenazo iii sodium salt
Synonyms	Arsenazo III ,Th,Zr and other metals 2,2'-(1,8-Dihydroxy-3,6-disulfonaphthylene-2,7-bisazo)bisbenzenearsonic acid 2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulfonic acid 2,7-Naphthalenedisulfonic acid, 3,6-bis((2-arsonophenyl)azo)-4,5-dihydroxy- 2,7-Bis(2-arsonophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonic Acid 2,2'-(1,8-dihydroxy-3,6-disulfonaphthylene-2,7-bisazo)bis(benzenearsonic acid) MFCD00036695 4,5-dihydroxy-3,6-bis-<(2-arsonophenyl)azo>-2,7-naphthalenedisulfonic acid 2,7-Bis(2-arsonophenylazo)chromotropic acid 3,6-bis((E)-(2-Arsonophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic acid Arsenazo Ⅲ Neothorine 2,7-Naphthalenedisulfonic acid, 3,6-bis[(E)-2-(2-arsonophenyl)diazenyl]-4,5-dihydroxy- Arsenazo III free acid p.a. ARSENAZO III,REAG. 3,6-bis-(2-arsono-phenylazo)-4,5-dihydroxy-naphthalene-2,7-disulfonic acid Arsenazo III 3,6-Bis-(2-arsono-phenylazo)-4,5-dihydroxy-naphthalin-2,7-disulfonsaeure EINECS 216-788-6 3,6-Bis[(E)-(2-arsonophenyl)diazenyl]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid

Description	Arsenazo III is a dye useful for detection of micromolar concentrations of ionized Ca2+. Arsenazo III can be used for determination of thorium, zirconium, uranium and rare earth elements[1][2].
Related Catalog	Research Areas >> Others Signaling Pathways >> Others >> Others
References	[1]. Arsenazo III is a dye useful fKendrick NC. Purification of arsenazo III, a Ca2+-sensitive dye. Anal Biochem. 1976 Dec;76(2):487-501. [2]. Savvin S B. Analytical use of arsenazo III: determination of thorium, zirconium, uranium and rare earth elements. Talanta, 1961, 8(9): 673-685.

Melting Point	>320ºC(lit.)
Molecular Formula	C₂₂H₁₈As₂N₄O₁₄S₂
Molecular Weight	776.370
Exact Mass	775.869263
PSA	330.46000
LogP	-5.25
Appearance	Powder \| Brown
Storage condition	Store at RT.
Water Solubility	ammonium hydroxide: soluble1mg/mL

Symbol	GHS06, GHS09
Signal Word	Danger
Hazard Statements	H301 + H331-H410
Precautionary Statements	P261-P273-P301 + P310-P311-P501
Personal Protective Equipment	Eyeshields;Faceshields;Gloves;type P2 (EN 143) respirator cartridges
Hazard Codes	T,N
Risk Phrases	R23/25
Safety Phrases	20/21-28-45-60-61
RIDADR	UN 3465 6.1/PG 2
WGK Germany	3
Packaging Group	III
Hazard Class	6.1(b)

148-25-4

1668-00-4

Literature: Doklady Akademii Nauk SSSR, , vol. 127, p. 1231 Doklady Chemistry, 124-129<1959>673

Precursor 1
148-25-4
DownStream 0