Padimate O

About Padimate O

Padimate O is an API reference standard carrying the CAS registry number 21245-02-3. The compound has the formula C17H27NO2, corresponding to a molecular weight of 277.4 g/mol. Systematically, it is named 2-ethylhexyl 4-(dimethylamino)benzoate. It is also known as 2-ethylhexyl-p-dimethylaminobenzoate or Octyl dimethyl PABA.

The product is provided as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

Laboratories use this the parent drug substance standard for identity and assay testing, system suitability checks and method validation supporting ANDA and DMF filings. Our customers for this product work in pharmaceutical manufacturing and academic and industrial research.

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

Typical applications

Identification & assay
Method development & validation
QC reference material

Industries

Specifications & identifiers

Chemical identifiers
Product name	Padimate O
Catalogue No.	VQ-043357
CAS Number	21245-02-3
IUPAC name	2-ethylhexyl 4-(dimethylamino)benzoate
Molecular formula	C₁₇H₂₇NO₂
Molecular weight	277.4 g/mol
Exact mass	277.2042
Grade	Reference Standard
HSN code	38229090
InChIKey	WYWZRNAHINYAEF-UHFFFAOYSA-N
SMILES	CCCCC(CC)COC(=O)C1=CC=C(C=C1)N(C)C
PubChem CID	30541

Physical properties
Physical form	Solid
LogP (XLogP3)	5
H-bond donors / acceptors	0 / 3
TPSA	29.5 Å²
Synonyms	2-ethylhexyl-p-dimethylaminobenzoate, 4-N,N'-dimethylamino-benzoic acid, 2-ethylhexyl ester, Octyl dimethyl PABA, Escalol 507, Eusolex 6007, Arlatone UVB, 4-(Dimethylamino)benzoic acid 2-ethylhexyl ester, Benzoic acid, 4-(dimethylamino)-, 2-ethylhexyl ester, 2-Ethylhexyl p-dimethylaminobenzoate, Uvasorb dmo, 2-Ethylhexyl-4-dimethylaminobenzoate

Safety & hazard information (GHS)

Harmful / irritant

Health hazard

Signal word: Danger

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P203, P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P318, 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 Padimate O?

The CAS Registry Number of Padimate O is 21245-02-3. It is also known as 2-ethylhexyl-p-dimethylaminobenzoate, 4-N,N'-dimethylamino-benzoic acid, 2-ethylhexyl ester, Octyl dimethyl PABA.

What is the molecular formula and molecular weight of Padimate O?

Padimate O has the molecular formula C17H27NO2 and a molecular weight of 277.4 g/mol. Its IUPAC name is 2-ethylhexyl 4-(dimethylamino)benzoate.

Which grade and pack sizes of Padimate O can I order?

We supply Padimate O 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 Padimate O?

Yes. Every lot of Padimate O 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 Padimate O be shipped internationally?

Yes. Padimate O 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.