Naphthenic Acid

Description

Naphthenic Acid · CAS 1338-24-5 · C21H38O4. UNII YNM5U6B7A4. Boiling Point: 270 to 470 °F at 760 mmHg (USCG, 1999); Flash Point: 300 °F (USCG, 1999).

Identification

CAS Registry Number	1338-24-5
PubChem CID	71586777
Molecular formula	C21H38O4
IUPAC name	3-(4-ethylcyclohexyl)propanoic acid;3-(3-ethylcyclopentyl)propanoic acid
UNII (FDA)	YNM5U6B7A4

Computed Descriptors

Molecular Weight	354.5
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	8
Exact Mass	354.27700969
Monoisotopic Mass	354.27700969
Topological Polar Surface Area	74.6
Heavy Atom Count	25
Formal Charge	0
Complexity	311

Physical & Chemical Properties

Boiling Point	270 to 470 °F at 760 mmHg (USCG, 1999)
Flash Point	300 °F (USCG, 1999)

Physical description & handling notes

• Light yellow to black liquid; [ICSC] Commercial grade: dark liquid with an unpleasant odor; [Hawley]
• 0.982 at 68 °F (USCG, 1999) - Less dense than water; will float

Documented Uses

• A mixture of saturated fatty acids extracted from petroleum and used to make metallic naphthenates; [Hawley] Used to make succinic acid, organic peroxides, corrosion inhibitors, and metal naphthenates (used as lubricants, driers, catalysts, fungicides, and emulsifiers); [HSDB]
• Petroleum Production and Refining [Category: Industry]
• Information on 3 consumer products that contain Naphthenic acid in the following categories is provided:

Synonyms

Agenap; Naphid; Sunaptic acid B; Sunaptic acid C; Acide naphtenique; YNM5U6B7A4; TENSIOACTIV N; SUNAPTIC B; NA-200; RefChem:831988; Naphthenic acid; UNII-YNM5U6B7A4; Naphthenic acid [BSI:ISO]; NAPHTHENIC ACID [ISO]; NAPHTHENIC ACID [HSDB]; Acide naphtenique [ISO-French]

Frequently Asked Questions

What are the CAS number and molecular formula of Naphthenic Acid?

CAS 1338-24-5; molecular formula C21H38O4; molecular weight — g/mol.

What other names is Naphthenic Acid known by?

Agenap, Naphid, Sunaptic acid B, Sunaptic acid C, Acide naphtenique, YNM5U6B7A4.

What are the key physical properties of Naphthenic Acid?

Boiling Point: 270 to 470 °F at 760 mmHg (USCG, 1999); Flash Point: 300 °F (USCG, 1999).

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.