Sudan red 7B (fat red bluish, solvent red 19, fat red 7B), Sigma-Aldrich®

Supplier: SIGMA-ALDRICH MICROSCOPY

Synonyms: N-Ethyl-1-((4-(phenyldiazenyl)phenyl)diazenyl)naphthalen-2-amine

M-Clarity™ quality level = MQ200

201618-50G 201618-10G
201618-50GEA 239 GBP
201618-50G 201618-10G
Sudan red 7B (fat red bluish, solvent red 19, fat red 7B), Sigma-Aldrich®
Sudan Red 7B (Fat Red Bluish, Solvent Red 19, Fat Red 7B)

Sudan Red 7B has been used to stain the fat bodies of Ostrinia nubilalis (Hübner) larvae. Sudan red 7B, also known as fat red, is a non-fluorescent stain.[2] It is effectively used to stain lipids and is used to indicate the presence of suberin in cell walls.[2][3][4] Sudan red 7B acts as a marker for formosan subterranean termite, Coptotermes fornosanus Shiraki.

Formula: C₂₄H₂₁N₅
MW: 379,4570 g/mol
Melting Pt: 130 °C (dec., lit.)
Storage Temperature: Ambient
MDL Number: MFCD00003904
CAS Number: 6368-72-5
EINECS: 228-862-5
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Specification Test Results

Appearance (color) Red to very dark red and purple to very dark purple and brown to very dark brown and very dark red-brown
Appearance (form) Powder
Thin layer chromatogr. Consistent with listing
Solubility (color) Red to very dark red
Solubility (turbidity) Clear to turbid
Solubility (method) 10mg/ml (1%), acetone
Carbon content 72 - 77 %
Nitrogen content 17 - 19 %
Infrared spectrum Conforms to structure
Wavelength (1) (uv) 528 - 538 nm
Molar absorbancy index (1) ≥ 24660
Wavelength (2) (uv) 367 - 377 nm
Molar absorbancy index (2) ≥ 14230
Solvent (uv) Toluene
Recommended retest period 48 months

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