Neutral Red (CAS 553-24-2) Sigma-Aldrich

Neutral Red molecular structure — Molecular structure

The Sigma-Aldrich catalog lists 12 grades and pack sizes of Neutral Red (CAS 553-24-2). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS	553-24-2
Molecular formula	C15H17ClN4
Molecular weight	288.78 g/mol
IUPAC name	8-N,8-N,3-trimethylphenazine-2,8-diamine;hydrochloride
Synonyms	Toluylene Red · 3-Amino-7-dimethylamino-2-methylphenazine hydrochloride · Kernechtrot · C.I. Basic Red 5 · Neutral Red chloride · Neutral Red W

Safety & Hazards (GHS) Warning

Irritant

Health hazard

H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation
H341 Suspected of causing genetic defects

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand	Product / grade	Code
Sigma	NEUTRAL RED CELL CULTURE TESTED	N4638-1G N4638-5G	Request Quote
Sigma	NEUTRAL RED PURIFIED	N7005-1G N7005-25G N7005-5G	Request Quote
Sigma	NEUTRAL RED SOLUTION	N6264-50ML	Request Quote
Sigma	NEUTRAL RED SOLUTION (0.33%) 3.3 G/L IN	N2889-100ML N2889-20ML	Request Quote
Sigma	NEUTRAL RED, CERTIFIED (C.I. 50040)	861251-25G	Request Quote
Sigma	NEUTRAL RED, FOR MICROSCOPY	72210-100G 72210-25G 72210-5G	Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.