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524204

Sigma-Aldrich

2,5-Dichloro-4-nitroaniline

97%

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About This Item

Linear Formula:
Cl2C6H2(NO2)NH2
CAS Number:
6627-34-5
Molecular Weight:
207.01
EC Number:
229-591-5
MDL number:
MFCD00025157
UNSPSC Code:
12352100
PubChem Substance ID:
24874396
NACRES:
NA.22

assay

97%

mp

154-158 °C (lit.)

functional group

chloro
nitro

SMILES string

Nc1cc(Cl)c(cc1Cl)[N+]([O-])=O

InChI

1S/C6H4Cl2N2O2/c7-3-2-6(10(11)12)4(8)1-5(3)9/h1-2H,9H2

InChI key

JBXZCPXEYAEMJS-UHFFFAOYSA-N

General description

2,5-Dichloro-4-nitroaniline is primary aniline indicator.[1] Its pKa in sulfonate and water are -2.12 and -1.78, respectively.[2]

Application

2,5-Dichloro-4-nitroaniline may be employed as an indicator for the estimation of acidity of strong acids.[3]

signalword

Danger

Hazard Classifications

Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Aquatic Chronic 2 - STOT RE 2

Storage Class

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKBW1814V
MKBC2926V
MKBC2926
01811BJ
00615BH

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Solvent Effects in Organic Chemistry. II. Sulfolane1--A Weakly Basic Aprotic Solvent of High Dielectric Constant2.
Arnett EM and Douty CF.
Journal of the American Chemical Society, 86(3), 409-412 (1964)
Shashi Kant Shukla et al.
The journal of physical chemistry. B, 117(8), 2456-2465 (2013-02-05)
Acidity functions were used to express the ability of a solvent/solution to donate/accept a proton to a solute. The present work accounts for the acidity determination of HCOOH, CH3COOH, and CH3CH2COOH in the alkylimidazolium-based protic ionic liquids (PILs), incorporated with
A redetermination and extension of the H 0 scale of acidity in aqueous perchloric acid.
Yates K and Wai H.
Journal of the American Chemical Society null

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