9-Methylidenefluorene

About 9-Methylidenefluorene

9-Methylidenefluorene is an impurity of Fluorene carrying the CAS registry number 4425-82-5. Its molecular formula is C14H10 and its molecular weight is 178.23 g/mol. It is also known as Dibenzofulvene or 9-Methylene-9H-fluorene.

It is supplied as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

This Fluorene impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. It is used across pharmaceutical manufacturing and academic and industrial research.

We offer 9-Methylidenefluorene in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Related to Fluorene

View every impurity, metabolite and intermediate we list for Fluorene.

Fluorene impurities

Specifications & identifiers

Chemical identifiers
Product name	9-Methylidenefluorene
Catalogue No.	VQ-040282
CAS Number	4425-82-5
IUPAC name	9-methylidenefluorene
Molecular formula	C₁₄H₁₀
Molecular weight	178.23 g/mol
Exact mass	178.0783
Grade	Reference Standard
HSN code	38229090
InChIKey	ZYASLTYCYTYKFC-UHFFFAOYSA-N
SMILES	C=C1C2=CC=CC=C2C3=CC=CC=C13
PubChem CID	78147

Physical properties
Physical form	Solid
LogP (XLogP3)	3.7
H-bond donors / acceptors	0 / 0
TPSA	0 Å²
Synonyms	Dibenzofulvene, 9-Methylene-9H-fluorene, 9H-Fluorene, 9-methylene-, 9-methylenefluorene, 9-Methylene-fluorene, fluorenylidenemethane, 9-Methylene-9H-fluorene #, 9-Methylidenefluorene (Stabilized with Hydroquinone), Dibenzofulvene (DBF) Oligomer-9-Methylene-9H-fluorene

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of 9-Methylidenefluorene?

The CAS Registry Number of 9-Methylidenefluorene is 4425-82-5. It is also known as Dibenzofulvene, 9-Methylene-9H-fluorene, 9H-Fluorene, 9-methylene-.

What is the molecular formula and molecular weight of 9-Methylidenefluorene?

9-Methylidenefluorene has the molecular formula C14H10 and a molecular weight of 178.23 g/mol. Its IUPAC name is 9-methylidenefluorene.

What is 9-Methylidenefluorene used for?

9-Methylidenefluorene is supplied as a characterised reference material related to Fluorene. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of 9-Methylidenefluorene can I order?

We supply 9-Methylidenefluorene in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 9-Methylidenefluorene?

Yes. Every lot of 9-Methylidenefluorene is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can 9-Methylidenefluorene be shipped internationally?

Yes. 9-Methylidenefluorene is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.