Sodium Phosphate, Monobasic, Monohydrate

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  • Identifiers

    CAS number
    10049-21-5

    Molecular formula
    H4NaO5P

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

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 94.76%
    Sharp 13.66%
    Bitter 13.32%
    Sour 13.06%
    Clean 11.84%
    Sweaty 10.76%
    Animal 9.16%
    Cheesy 8.85%
    Milky 8.8%
    Pungent 8.5%

     

    Flavor
    Odorless 61.34%
    Vinegar 35.46%
    Pungent 33.37%
    Sour 32.38%
    Bland 23.64%
    Formyl 23.21%
    Rotten 22.79%
    Mousy 21.43%
    Soy 20.26%
    Decomposing cabbage 19.83%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    4.5 (weak acid)

    Molecular weight
    137.99 g/mol

    Flash point

    • 57.76 ˚C est.

  • Synonyms

    • Sodium phosphate monobasic monohydrate
    • Sodium dihydrogen phosphate monohydrate
    • Monosodium phosphate monohydrate
    • Phosphoric acid, monosodium salt, monohydrate
    • Sodium phosphate monohydrate
    • sodium dihydrogenphosphate monohydrate
    • SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE
    • 593YOG76RN
    • DTXSID6073994
    • CHEBI:114249
    • sodium dihydrogen phosphate--water (1/1)
    • MONOBASIC SODIUM PHOSPHATE MONOHYDRATE
    • MONOBASIC SODIUM PHOSPHATE, MONOHYDRATE
    • SODIUM PHOSPHATE MONOBASIC, MONOHYDRATE
    • SODIUM PHOSPHATE MONOBASIC (MONOHYDRATE)
    • SODIUM PHOSPHATE, MONOBASIC MONOHYDRATE [MI]
    • SODIUM PHOSPHATE MONOBASIC,MONOHYDRATE [VANDF]
    • SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE [II]
    • SODIUM PHOSPHATE,MONOBASIC,MONOHYDRATE [VANDF]
    • SODIUM PHOSPHATE MONOBASIC (MONOHYDRATE) [WHO-DD]
    • SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE [ORANGE BOOK]
    • OSMOPREP COMPONENT SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE
    • VISICOL COMPONENT SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE
    • SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE (II)
    • Sodium dihydrogenorthophosphate monohydrate
    • RefChem:887809
    • DTXCID4032538
    • Sodium dihydrogen phosphatemonohydrate
    • SODIUM PHOSPHATE MONOBASIC,MONOHYDRATE
    • SODIUM PHOSPHATE,MONOBASIC,MONOHYDRATE
    • SODIUM PHOSPHATE, MONOBASIC MONOHYDRATE
    • SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE COMPONENT OF VISICOL
    • SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE COMPONENT OF OSMOPREP
    • 600-102-0
    • 10049-21-5
    • sodium;dihydrogen phosphate;hydrate
    • MFCD00149208
    • Sodium Phosphate Monobasic hydrate
    • Phosphoric acid, monosodium salt, monohydrate (8CI,9CI)
    • Phosphoric acid (sodium hydrate)
    • sodium dihydrogen phosphate hydrate
    • UNII-593YOG76RN
    • MSP Monohydrate
    • H4NaO5P
    • SodiumPhosphateMonobasichydrate
    • SCHEMBL101070
    • orb2942178
    • sodium dihydrogenphosphate hydrate
    • monohydratemonobasicsodium phosphate
    • sodium dihydrogen phosphate, hydrate
    • AKOS015913977
    • AKOS028109193
    • sodium phosphate mono-basic monohydrate
    • FN30561
    • 99% +,AR
    • monosodium mono(hydrogenphosphate) hydrate
    • NS00134324
    • Sodium dihydrogen phosphate--water (1/1/1)
    • Sodium phosphate monobasic monohydrate, p.a.
    • F095388
    • Sodium phosphate monobasic monohydrate ACS granular
    • Sodium dihydrogen phosphate monohydrate, Puratronic?
    • Q27195646
    • Sodium phosphate monobasic monohydrate, ACS reagent, >=98%
    • Sodium phosphate monobasic monohydrate, technical grade, 90%
    • Sodium Phosphate, Monobasic, Monohydrate, Cell Culture Grade
    • Sodium phosphate monobasic monohydrate, purum p.a., >=99.0% (T)
    • Sodium phosphate monobasic monohydrate, Vetec(TM) reagent grade, 98%
    • Sodium phosphate monobasic monohydrate, BioXtra, for molecular biology, >=99.5% (T)
    • Sodium phosphate monobasic monohydrate, puriss. p.a., ACS reagent, >=99.0% (T)
    • Sodium phosphate monobasic monohydrate, BioReagent, suitable for electrophoresis, 98.0-102.0%
    • 10049-21-5

  • Applications

    Sodium Phosphate, Monobasic, Monohydrate (CAS number: 10049-21-5) is used as a pH buffering and acidity regulator in foods and beverages, helping stabilize processing conditions and taste. In cleaning and household formulations, it acts as a builder/sequestrant, softening water and supporting stable formulations. In pharmaceuticals, it serves as a buffering agent and stabilizer for solution formulations. In cosmetics and personal care, it functions as a buffering agent and chelating agent to enhance formulation stability. In industrial manufacturing and water treatment, it is used for pH control and to minimize mineral buildup, protecting equipment and processes. Applications are subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 96.71
    methanol 211.68
    isopropanol 62.41
    water 193.97
    ethyl acetate 9.0
    n-propanol 58.14
    acetone 30.82
    n-butanol 40.75
    acetonitrile 16.45
    DMF 329.57
    toluene 1.43
    isobutanol 35.03
    1,4-dioxane 38.5
    methyl acetate 14.75
    THF 57.52
    2-butanone 14.04
    n-pentanol 21.01
    sec-butanol 37.28
    n-hexane 1.24
    ethylene glycol 160.77
    NMP 116.41
    cyclohexane 0.9
    DMSO 178.39
    n-butyl acetate 6.14
    n-octanol 8.78
    chloroform 5.89
    n-propyl acetate 5.07
    acetic acid 129.19
    dichloromethane 6.69
    cyclohexanone 16.06
    propylene glycol 134.16
    isopropyl acetate 5.63
    DMAc 119.26
    2-ethoxyethanol 53.31
    isopentanol 24.6
    n-heptane 0.98
    ethyl formate 23.41
    1,2-dichloroethane 5.26
    n-hexanol 17.87
    2-methoxyethanol 142.98
    isobutyl acetate 2.89
    tetrachloromethane 2.25
    n-pentyl acetate 5.75
    transcutol 35.85
    n-heptanol 11.88
    ethylbenzene 0.98
    MIBK 6.39
    2-propoxyethanol 47.02
    tert-butanol 63.55
    MTBE 14.05
    2-butoxyethanol 30.53
    propionic acid 61.48
    o-xylene 2.03
    formic acid 225.59
    diethyl ether 9.66
    m-xylene 1.73
    p-xylene 1.41
    chlorobenzene 2.05
    dimethyl carbonate 13.19
    n-octane 0.47
    formamide 160.79
    cyclopentanone 32.8
    2-pentanone 11.12
    anisole 4.83
    cyclopentyl methyl ether 13.28
    gamma-butyrolactone 52.43
    1-methoxy-2-propanol 85.91
    pyridine 13.16
    3-pentanone 6.46
    furfural 48.47
    n-dodecane 0.39
    diethylene glycol 67.11
    diisopropyl ether 2.48
    tert-amyl alcohol 39.98
    acetylacetone 12.18
    n-hexadecane 0.39
    acetophenone 5.1
    methyl propionate 14.61
    isopentyl acetate 5.32
    trichloroethylene 6.56
    n-nonanol 7.34
    cyclohexanol 17.81
    benzyl alcohol 9.39
    2-ethylhexanol 6.32
    isooctanol 7.79
    dipropyl ether 5.35
    1,2-dichlorobenzene 2.38
    ethyl lactate 11.64
    propylene carbonate 23.62
    n-methylformamide 141.4
    2-pentanol 18.82
    n-pentane 1.54
    1-propoxy-2-propanol 26.06
    1-methoxy-2-propyl acetate 9.49
    2-(2-methoxypropoxy) propanol 17.01
    mesitylene 1.4
    ε-caprolactone 18.2
    p-cymene 1.36
    epichlorohydrin 28.13
    1,1,1-trichloroethane 3.02
    2-aminoethanol 157.48
    morpholine-4-carbaldehyde 91.01
    sulfolane 75.61
    2,2,4-trimethylpentane 1.0
    2-methyltetrahydrofuran 25.13
    n-hexyl acetate 7.68
    isooctane 0.71
    2-(2-butoxyethoxy)ethanol 25.02
    sec-butyl acetate 2.88
    tert-butyl acetate 6.67
    decalin 0.52
    glycerin 189.11
    diglyme 38.05
    acrylic acid 73.44
    isopropyl myristate 2.85
    n-butyric acid 43.92
    acetyl acetate 5.71
    di(2-ethylhexyl) phthalate 6.18
    ethyl propionate 5.57
    nitromethane 92.11
    1,2-diethoxyethane 6.64
    benzonitrile 5.89
    trioctyl phosphate 4.93
    1-bromopropane 3.2
    gamma-valerolactone 56.26
    n-decanol 5.4
    triethyl phosphate 3.79
    4-methyl-2-pentanol 9.09
    propionitrile 12.65
    vinylene carbonate 21.08
    1,1,2-trichlorotrifluoroethane 46.74
    DMS 6.46
    cumene 1.1
    2-octanol 6.66
    2-hexanone 5.68
    octyl acetate 4.77
    limonene 2.07
    1,2-dimethoxyethane 50.76
    ethyl orthosilicate 3.53
    tributyl phosphate 4.71
    diacetone alcohol 21.65
    N,N-dimethylaniline 5.39
    acrylonitrile 21.93
    aniline 8.76
    1,3-propanediol 111.39
    bromobenzene 1.2
    dibromomethane 3.77
    1,1,2,2-tetrachloroethane 8.19
    2-methyl-cyclohexyl acetate 3.88
    tetrabutyl urea 7.62
    diisobutyl methanol 3.6
    2-phenylethanol 8.13
    styrene 1.13
    dioctyl adipate 5.07
    dimethyl sulfate 29.06
    ethyl butyrate 4.59
    methyl lactate 32.18
    butyl lactate 11.01
    diethyl carbonate 3.65
    propanediol butyl ether 32.81
    triethyl orthoformate 4.42
    p-tert-butyltoluene 1.53
    methyl 4-tert-butylbenzoate 10.58
    morpholine 60.24
    tert-butylamine 26.34
    n-dodecanol 3.95
    dimethoxymethane 57.57
    ethylene carbonate 16.86
    cyrene 19.1
    2-ethoxyethyl acetate 7.51
    2-ethylhexyl acetate 3.7
    1,2,4-trichlorobenzene 3.09
    4-methylpyridine 11.06
    dibutyl ether 3.34
    2,6-dimethyl-4-heptanol 3.6
    DEF 28.87
    dimethyl isosorbide 18.4
    tetrachloroethylene 6.75
    eugenol 14.67
    triacetin 7.44
    span 80 19.04
    1,4-butanediol 48.67
    1,1-dichloroethane 4.03
    2-methyl-1-pentanol 13.19
    methyl formate 83.44
    2-methyl-1-butanol 25.39
    n-decane 0.55
    butyronitrile 13.22
    3,7-dimethyl-1-octanol 5.6
    1-chlorooctane 1.63
    1-chlorotetradecane 0.8
    n-nonane 0.53
    undecane 0.44
    tert-butylcyclohexane 0.65
    cyclooctane 0.43
    cyclopentanol 35.23
    tetrahydropyran 17.29
    tert-amyl methyl ether 10.85
    2,5,8-trioxanonane 26.38
    1-hexene 2.91
    2-isopropoxyethanol 24.25
    2,2,2-trifluoroethanol 52.42
    methyl butyrate 9.43

    Scent© AI

1 4

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