FD&C Yellow No. 4 - Biological Stain , CAS No.131-79-3

CAS: 131-79-3 Cat. No.: F1350883 Molecular Weight: 261.32 EC Number: 205-039-9
AVAILABLE TO ORDER
GRADE & PURITY Biological Stain ? Biological stain grade — dyes characterized for staining cells and tissues. Use in histology and microscopy where staining consistency matters.
Storage
Room temperature
Shipped In
Normal
Size
Status
Price
Qty
100mg
F1350883-100mg
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$76.90
250mg
F1350883-250mg
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$127.90
1g
F1350883-1g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$330.90
5g
F1350883-5g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$1,185.90
Enter a quantity for the sizes you want to add.
🧪

Why this grade

Biological Stain Biological Stain for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Specifications & Purity
Biological Stain
Storage
Room temperature
Shipped In
Normal
Grade
Biological Stain
Names and Identifiers
Canonical SmilesCC1=CC=CC=C1N=NC2=C(C=CC3=CC=CC=C32)N
IUPAC Name1-[(2-methylphenyl)diazenyl]naphthalen-2-amine
InChIKeyBWLVSYUUKOQICP-UHFFFAOYSA-N
INCHI1S/C17H15N3/c1-12-6-2-5-9-16(12)19-20-17-14-8-4-3-7-13(14)10-11-15(17)18/h2-11H,18H2,1H3
Molecular Weight 261.32

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassBenzenoids
ClassNaphthalenes
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentNaphthalenes
Alternative Parents Toluenes  Azo compounds  Propargyl-type 1,3-dipolar organic compounds  Primary amines  Organopnictogen compounds  Hydrocarbon derivatives  
Molecular FrameworkAromatic homopolycyclic compounds
Substituents Naphthalene - Toluene - Monocyclic benzene moiety - Azo compound - Organic 1,3-dipolar compound - Propargyl-type 1,3-dipolar organic compound - Organic nitrogen compound - Organopnictogen compound - Hydrocarbon derivative - Primary amine - Organonitrogen compound - Amine - Aromatic homopolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as naphthalenes. These are compounds containing a naphthalene moiety, which consists of two fused benzene rings.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:
Chemical and Physical Properties
Molecular Weight261.320 g/mol
XLogP34.600
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count3
Rotatable Bond Count2
Exact Mass261.127 Da
Monoisotopic Mass261.127 Da
Topological Polar Surface Area50.700 Ų
Heavy Atom Count20
Formal Charge0
Complexity341.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Solution Calculators
Reviews

Customer Reviews

Need help choosing the grade?

Our grade selection guide covers purity, stabilizer status, and application suitability for all variants in our catalog.

View Biological Stain grade guide →

Shall we send you a message when we have discounts available?

Remind me later

Thank you! Please check your email inbox to confirm.

Oops! Notifications are disabled.