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Neutral Red

Neutral Red structure

CAS No:
553-24-2
Formula:
C15H16N4.ClH
Chemical Name:
Neutral Red
Synonyms:
2,8-Phenazinediamine,N8,N8,3-trimethyl-,hydrochloride (1:1);C.I. Basic Red 5,monohydrochloride;Toluylene red;2,8-Phenazinediamine,N8,N8,3-trimethyl-,monohydrochloride;C.I. 50040;3-Amino-7-dimethylamino-2-methylphenazine hydrochloride;Neutral Red;Neutral Red W;C.I. Basic Red 5;Nuclear Fast Red (basic dye);135446-89-8;167382-92-5;1062559-28-7;1051370-39-8
Categories:
Dyes and Pigments > Dye

Description

dark green powder

Neutral red is a hydrochloride obtained by combining the free base of neutral red with one equivalent of hydrochloric acid. Neutral red acts as a pH indicator, changing from red to yellow between pH 6.8 and 8.0. It has a role as a dye, an acid-base indicator and a two-colour indicator. It contains a neutral red(1+).|A vital dye used as an indicator and biological stain. Various adverse effects have been observed in biological systems.

Neutral Red Basic Attributes

Molecular Weight：

288.77528

Exact Mass：

288.114166

EC Number：

209-035-8

UNII：

261QK3SSBH

NSC Number：

5756|3092

HScode：

32041300

Characteristics

PSA：

55.04000

XLogP3：

4.12280

Appearance：

Very dark green Solid

Density：

1.1590 (rough estimate)

Melting Point：

290 °C (dec.)(lit.)

Boiling Point：

497.3ºC at 760mmHg

Water Solubility：

H2O: 50 g/L

Storage Conditions：

Store at 0-5°C

Toxicity：

Intravenous-rat LD50: 112 mg/kg; Intravenous-mouse LD50: 142 mg/kg

Flammability characteristics：

Flammable; burning produces toxic nitrogen oxides and hydrogen chloride fumes

Safety Information

Transport codes：

NONH for all modes of transport

wgk germany：

hazard class code：

68-36/37/38

safety instructions：

36/37-37/39-36-26-24/25

RTECS Number：

SG1400000

Marks：

Xn,Xi

Storage features：

Warehouse ventilated, low temperature and dry

Stability/Shelf Life：

Stable. Incompatible with strong oxidizing agents.

Precautionary statement(s)：

P201, P202, P261, P264, P270, P271, P280, P281, P301+P310, P302+P352, P304+P340, P305+P351+P338, P308+P313, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501

Hazard Statements：

H301

GHS Classification：

|Danger|H301 (33.33%): Toxic if swallowed [Danger Acute toxicity, oral]|P201, P202, P261, P264, P270, P271, P280, P281, P301+P310, P302+P352, P304+P340, P305+P351+P338, P308+P313, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, and P501|Aggregated GHS information provided by 5 companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Toxicity

Toxicity class：

highly toxic

Drug Information

MeSH：

Chemicals and substances that impart color including soluble dyes and insoluble pigments. They are used in INKS; PAINTS; and as INDICATORS AND REAGENTS. (See all compounds classified as Coloring Agents.)|Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant and Hackh's Chemical Dictionary, 5th ed, p301, p499) (See all compounds classified as Indicators and Reagents.)

MeSH Entry Terms：

C.I. Basic Red 5

Neutral Red Use and Manufacturing

Uses

Used as indicator for nitrogen determination; pH indicator.

Manufacturing Info：

2,8-Phenazinediamine, N8,N8,3-trimethyl-, hydrochloride (1:1): ACTIVE

Computed Properties

Molecular Weight:288.77
Hydrogen Bond Donor Count:2
Hydrogen Bond Acceptor Count:4
Rotatable Bond Count:1
Exact Mass:288.1141743
Monoisotopic Mass:288.1141743
Topological Polar Surface Area:55
Heavy Atom Count:20
Complexity:319
Covalently-Bonded Unit Count:2
Compound Is Canonicalized:Yes

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