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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Identification

Chemical structure
Display Name:
Naphthenic acids
EC Number:
215-662-8
EC Name:
Naphthenic acids
CAS Number:
1338-24-5
Molecular formula:
For the acidic (naphthenic) fraction: CnH2n+zO2, where n = carbon number and z = homologous group series number: z = 0 when no ring structures are present, z = -2 when 1 ring is present, z = -4 when 2 rings are present etc. For the non-acidic fraction: not applicable
IUPAC Name:
11-(decahydronaphthalen-2-yl)undecanoic acid; 11-cyclopentylundecanoic acid; 15-cyclohexylpentadecanoic acid; 3-(tetradecahydroanthracen-2-yl)propanoic acid; 4-(tetradecahydroanthracen-2-yl)butanoic acid; 7-(tetradecahydroanthracen-2-yl)heptanoic acid; 9-(octahydropentalen-2-yl)nonanoic acid; dodecahydro-1H-phenalene-1-carboxylic acid

Type of Substance

Composition:
UVCB
Origin:
petroleum product

Substance Identifiers open all close all

  • Crude naphthenic acids
  • Purified (distilled) naphthenic acids
  • Compositions

    Boundary Composition(s) open all close all

    State Form:
    liquid


    Constituent 1
    Reference substance name:
    Aromatic content
    IUPAC Name:
    Aromatic content
    Constituent 2
    Reference substance name:
    Acidic fraction, C8-C20, with 0-3 saturated C5 and C6-rings.
    Molecular formula:
    CnH2n+zO2, where n = carbon number and z = homologous group series number: z = 0 (no ring structures), z = -2 (1 ring), z = -4 (2 rings) etc.
    IUPAC Name:
    Acidic fraction, C8-C20, with 0-3 saturated C5 and C6-rings.
    Constituent 3
    Reference substance name:
    The non acidic fraction is composed of an aliphatic and an aromatic fraction, mainly C12-C22 structures.
    Molecular formula:
    not applicable; the non-acidic fraction covers several groups, each with its generic formula.
    IUPAC Name:
    The non acidic fraction is composed of an aliphatic and an aromatic fraction, mainly C12-C22 structures.

    Legal Entity Composition(s) open all close all

    State Form:
    liquid


    Constituent 1
    Reference substance name:
    Acidic fraction, C8-C20, with 0-3 saturated C5 and C6-rings.
    Molecular formula:
    CnH2n+zO2, where n = carbon number and z = homologous group series number: z = 0 (no ring structures), z = -2 (1 ring), z = -4 (2 rings) etc.
    IUPAC Name:
    Acidic fraction, C8-C20, with 0-3 saturated C5 and C6-rings.
    Constituent 2
    Reference substance name:
    Carboxylic acids, C8-C20
    Molecular formula:
    CnH2nO2 with a C range of C8-C20
    IUPAC Name:
    Carboxylic acids, C8-C20
    Constituent 3
    Chemical structure
    Reference substance name:
    Naphthenic acids, C8-C20, 1-ring
    Molecular formula:
    CnH2n-2O2, with a C-range of C8-C20.
    IUPAC Name:
    Naphthenic acids, C8-C20, 1-ring
    Constituent 4
    Reference substance name:
    Naphthenic acids, C8-C20, 2-rings
    Molecular formula:
    CnH2n-4O2, with a C-range of C8-C20.
    IUPAC Name:
    Naphthenic acids, C8-C20, 2-rings
    Constituent 5
    Reference substance name:
    Naphthenic acids, C8-C20, 3-rings
    Molecular formula:
    CnH2n-6O2, with a C-range of C8-C20
    IUPAC Name:
    Naphthenic acids, C8-C20, 3-rings
    Constituent 6
    Reference substance name:
    The non acidic fraction is composed of an aliphatic and an aromatic fraction, mainly C12-C22 structures.
    Molecular formula:
    not applicable; the non-acidic fraction covers several groups, each with its generic formula.
    IUPAC Name:
    The non acidic fraction is composed of an aliphatic and an aromatic fraction, mainly C12-C22 structures.
    Constituent 7
    Reference substance name:
    Aliphatic hydrocarbons, C12-C22
    Molecular formula:
    The aliphatic hydrocarbons,C12-C22 cover several groups, each with its generic formula. One group contains the alikanes without saturated rings. The molecular formula of this group is CnHn+2, with n range 12-22.
    IUPAC Name:
    Aliphatic hydrocarbons, C12-C22
    Constituent 8
    Reference substance name:
    Aromatic hydrocarbons, C12-C22
    Molecular formula:
    not applicable; the aromatic hydrocarbons,C12-C22 cover several groups, each with its generic formula. One example is the group of monoaromatics with a saturated side chain without saturated rings. The molecular formula of this group is CnHn-6, with n range 12-22.
    IUPAC Name:
    Aromatic hydrocarbons, C12-C22
    Constituent 9
    Reference substance name:
    Volatile organic compounds
    Molecular formula:
    not relevant, VOC is a group of substances with various molecular formulae
    IUPAC Name:
    Volatile organic compounds
    Constituent 10
    Reference substance name:
    Polyaromatic Hydrocarbon substances
    Molecular formula:
    not relevant; PAH is a group of substances with various molecular formulae
    IUPAC Name:
    Polyaromatic Hydrocarbon substances
    Constituent 11
    Chemical structure
    Reference substance name:
    Anthracene
    EC Number:
    204-371-1
    EC Name:
    Anthracene
    CAS Number:
    120-12-7
    Molecular formula:
    C14H10
    IUPAC Name:
    anthracene
    State Form:
    liquid


    Constituent 1
    Reference substance name:
    Acidic fraction, C8-C20, with 0-3 saturated C5 and C6-rings.
    Molecular formula:
    CnH2n+zO2, where n = carbon number and z = homologous group series number: z = 0 (no ring structures), z = -2 (1 ring), z = -4 (2 rings) etc.
    IUPAC Name:
    Acidic fraction, C8-C20, with 0-3 saturated C5 and C6-rings.
    Constituent 2
    Reference substance name:
    The non acidic fraction is composed of an aliphatic and an aromatic fraction, mainly C12-C22 structures.
    Molecular formula:
    not applicable; the non-acidic fraction covers several groups, each with its generic formula.
    IUPAC Name:
    The non acidic fraction is composed of an aliphatic and an aromatic fraction, mainly C12-C22 structures.
    Constituent 3
    Reference substance name:
    Aromatic content
    Molecular formula:
    not applicable; the aromatic content covers several groups, each with its generic formula.
    IUPAC Name:
    Aromatic content
    Constituent 4
    Chemical structure
    Reference substance name:
    Water
    EC Number:
    231-791-2
    EC Name:
    Water
    CAS Number:
    7732-18-5
    Molecular formula:
    H2O
    IUPAC Name:
    Water
    State Form:
    liquid


    Constituent 1
    Chemical structure
    Reference substance name:
    Acidic (naphthenic) fraction
    Molecular formula:
    CnH2n+zO2, where n = carbon number and z = homologous group series number: z = 0 when no ring structures are present, z = -2 when 1 ring is present, z = -4 when 2 rings are present etc.
    IUPAC Name:
    Acidic (naphthenic) fraction
    Constituent 2
    Reference substance name:
    Non acidic (unsaponifiable) fraction
    IUPAC Name:
    Non acidic (unsaponifiable) fraction


    Constituent 1
    Reference substance name:
    Acidic (naphthenic) fraction
    Molecular formula:
    CnH2n+zO2, where n = carbon number and z = homologous group series number: z = 0 when no ring structures are present, z = -2 when 1 ring is present, z = -4 when 2 rings are present etc.
    IUPAC Name:
    Acidic (naphthenic) fraction
    Constituent 2
    Reference substance name:
    Non acidic (unsaponifiable) fraction
    Molecular formula:
    Not applicable.
    IUPAC Name:
    Non acidic (unsaponifiable) fraction
    Constituent 3
    Chemical structure
    Reference substance name:
    Water
    EC Number:
    231-791-2
    EC Name:
    Water
    CAS Number:
    7732-18-5
    Molecular formula:
    H2O
    IUPAC Name:
    Water


    Constituent 1
    Chemical structure
    Reference substance name:
    Naphthenic acids
    EC Number:
    215-662-8
    EC Name:
    Naphthenic acids
    CAS Number:
    1338-24-5
    Molecular formula:
    For the acidic (naphthenic) fraction: CnH2n+zO2, where n = carbon number and z = homologous group series number: z = 0 when no ring structures are present, z = -2 when 1 ring is present, z = -4 when 2 rings are present etc. For the non-acidic fraction: not applicable
    IUPAC Name:
    11-(decahydronaphthalen-2-yl)undecanoic acid; 11-cyclopentylundecanoic acid; 15-cyclohexylpentadecanoic acid; 3-(tetradecahydroanthracen-2-yl)propanoic acid; 4-(tetradecahydroanthracen-2-yl)butanoic acid; 7-(tetradecahydroanthracen-2-yl)heptanoic acid; 9-(octahydropentalen-2-yl)nonanoic acid; dodecahydro-1H-phenalene-1-carboxylic acid

    Composition(s) generated upon use

    Other types of composition(s)