Neutral red
IUPAC: 8-N,8-N,3-trimethylphenazine-2,8-diamine;hydrochloride
| Formula / Notation | C15H17ClN4 |
|---|---|
| CAS Number | 553-24-2 |
| Molecular Weight | 288.77 |
| Appearance | Dark green solid; [Merck Index] |
| Also Known As | 8-N,8-N,3-trimethylphenazine-2,8-diamine;hydrochloride; 553-24-2; Toluylene Red; 3-Amino-7-dimethylamino-2-methylphenazine hydrochloride; Kernechtrot; C.I. Basic Red 5; Neutral Red chloride; Neutral Red W; 2,8-Phenazinediamine, N8,N8,3-trimethyl-, monohydrochloride; Michrome No. 226 |
| Category | Indicators |
What is Neutral red?
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+).
Formula & Notation
IUPAC Name: 8-N,8-N,3-trimethylphenazine-2,8-diamine;hydrochloride
Other Names / Synonyms: 8-N,8-N,3-trimethylphenazine-2,8-diamine;hydrochloride; 553-24-2; Toluylene Red; 3-Amino-7-dimethylamino-2-methylphenazine hydrochloride; Kernechtrot; C.I. Basic Red 5; Neutral Red chloride; Neutral Red W; 2,8-Phenazinediamine, N8,N8,3-trimethyl-, monohydrochloride; Michrome No. 226
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Molecular Weight | 288.77 |
| Appearance | Dark green solid; [Merck Index] |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
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+).
Used as a pH indicator in acid-base titrations, analytical chemistry, and chemical education demonstrations.
May be irritant or toxic in concentrated form. Handle with care. Consult SDS before use.
The formula or notation for Neutral red is: C15H17ClN4