Monosodium phosphate

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  • Identifiers

    CAS number
    7558-80-7

    Molecular formula
    H2NaO4P

    SMILES
    OP(=O)(O)[O-].[Na+]
    OHPOOHO⁻Na⁺

    Safety labels

    Irritant
    Irritant

  • Odor profile

    odorless 93.73%
    sour 16.24%
    sharp 14.57%
    bitter 12.57%
    clean 12.42%
    sweaty 11.56%
    milky 10.01%
    animal 9.81%
    cheesy 9.81%
    pungent 9.31%

    Scent© AI

  • Properties

    Molecular weight
    119.977 g/mol

    Melting point expt.

    • Decomposes at 75
    • 200 °C (decomposes)

    Solubility expt.

    • 121 g/L
    • Freely soluble in water. Insoluble in ethanol or ether
    • White, hygroscopic crystals. Decomp at 100 °C. Solubility: 94.9 g/100 g water at 25 °C. Insoluble in ethanol. /Sodium dihydrogen phosphate monohydrate/
    • In water, 85 g/100 mL

  • Synonyms

    • 7558-80-7
    • Monosodium phosphate
    • Sodium phosphate monobasic
    • SODIUM DIHYDROGEN PHOSPHATE
    • Sodium dihydrogenorthophosphate
    • Sodium acid phosphate
    • Sodium phosphate, monobasic
    • Sodium primary phosphate
    • Monosodium dihydrogen orthophosphate
    • Acid sodium phosphate
NaN -Infinity

IFRA Standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 No restriction Category 7A
Rinse-off products applied to the hair with some hand contact
 No restriction
Category 2
Products applied to the axillae
 No restriction Category 7B
Leave-on products applied to the hair with some hand contact
 No restriction
Category 3
Products applied to the face/body using fingertips
 No restriction Category 8
Products with significant anogenital exposure
 No restriction
Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
 No restriction
Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 No restriction Category 10A
Household care products with mostly hand contact
 No restriction
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 No restriction Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 No restriction
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 No restriction Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 No restriction
Category 5D
Baby Creams, baby Oils and baby talc
 No restriction Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 No restriction
Category 6
Products with oral and lip exposure
 No restriction Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 No restriction