Borax (B4Na2O7.10H2O)

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  • Identifiers

    CAS number
    1303-96-4

    Molecular formula
    B4H20Na2O17

    SMILES
    B1(OB2OB(OB(O1)O2)[O-])[O-].O.O.O.O.O.O.O.O.O.O.[Na+].[Na+]

    Safety labels

    Health Hazard
    Health

  • Odor profile

    Fragrance
    Odorless 59.23%
    Sweet 35.22%
    Fishy 17.84%
    Clean 13.25%
    Alcoholic 12.4%
    Nutty 11.63%
    Oily 11.54%
    Animal 11.51%
    Balsamic 10.94%
    Creamy 10.65%

     

    Flavor
    Bitter 38.53%
    Odorless 25.38%
    Fatty 23.21%
    Sweet-like 21.24%
    Roasted 19.61%
    Bouillon 19.12%
    Scallion 18.83%
    Alkaline 18.6%
    Cauliflower 18.53%
    Cereal 18.37%

     

    Odor impact est.
    Medium

  • Properties

    pKa est.
    6.85 (neutral)

    Molecular weight
    381.4 g/mol

    Melting point expt.

    • 75 °C (decomposes)
    • 167 °F

    Boiling point

    • 608 °F

    Flash point

    • 86.92 ˚C est.

    Solubility expt.

    • Aqueous solution is alkaline to litmus and phenolphthalein; pH about pH = 9.5
    • At 100 °C loses 5H2O; at 150 °C loses 9H2O; becomes anhydrous at 320 °C; borax dissolves many metallic oxides when fused with them
    • In water, 5.93X10+4 mg/L at 25 °C
    • 3.17 g/100 g water at 25 °C
    • 1 g/16 mL in water; 1 g/0.6 mL boiling water; 1 g/1 mL glycerol; insoluble in alcohol
    • Insoluble in ethanol
    • 0.60 g/100 g acetone
    • Solubility in water, g/100ml at 20 °C: 5.1
    • 6%

  • Synonyms

    • 1303-96-4
    • BORAX
    • Borax (B4Na2O7.10H2O)
    • Sodium borate decahydrate
    • Sodium pyroborate decahydrate
    • Antipyonin
    • Borascu
    • Boricin
    • Solubor
    • Tronabor
    • Jaikin
    • Neobor
    • Bura
    • Gerstley borate
    • Gertley borate
    • Boro-spray
    • 91MBZ8H3QO
    • Disodium tetraborate decahydrate
    • Sodium borate, decahydrate
    • Sodium biborate decahydrate
    • Boric acid (H2B4O7), disodium salt, decahydrate
    • Boron sodium oxide (B4Na2O7), decahydrate
    • sodium diborate
    • sodium meta borate
    • Borax 200ck
    • Borax 30C
    • RefChem:917461
    • Na(2)B(4)O(7) decahydrate
    • DTXSID2034384
    • 603-411-9
    • 615-285-2
    • Borax decahydrate
    • CHEBI:131366
    • CHEBI:38888
    • CHEBI:86222
    • Sodium Borate
    • Sodium tetraborate decahydrate
    • MFCD00149193
    • Borax [ISO]
    • disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane;decahydrate
    • DISODIUMTETRABORATETRIHYDRATE
    • 12447-40-4
    • Borax granular
    • B4H20Na2O17
    • Puffed borax
    • Na2B4O7 decahydrate
    • 20 Mule Team Borax
    • Sodium borate [JAN]
    • BORAX [HPUS]
    • BORAX [HSDB]
    • Sodium borate [JAN:NF]
    • UNII-91MBZ8H3QO
    • SODIUM BORATE [II]
    • BORAX [EP MONOGRAPH]
    • SCHEMBL108230
    • SODIUM BORATE [VANDF]
    • CCRIS 4946
    • HSDB 328
    • CHEMBL3833375
    • CDMADVZSLOHIFP-UHFFFAOYSA-N
    • DTXSID701014356
    • Borax (Na2(B4O7).10H2O)
    • AKOS015913997
    • AKOS030228672
    • SODIUM BORATE DECAHYDRATE [II]
    • SODIUM BORATE DECAHYDRATE [MI]
    • EBC-267055
    • FB01507
    • DA-51347
    • SODIUM BORATE DECAHYDRATE [WHO-DD]
    • AI3-51683
    • NS00134784
    • Q5319
    • SODIUM BORATE (NA2B4O7), DECAHYDRATE
    • Sodium borate decahydrate (Na2B4O7.10H2O)
    • Q26840931
    • Z330793292
    • Sodium bicyclo[3.3.1]tetraboroxane-3,7-bis(olate)--water (2/1/10)
    • 1313726-63-4
    • 71377-02-1
    • Disodium 3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane decahydrate
    • disodium;3,7-bis(oxidanidyl)-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane;decahydrate
    • 1303-96-4

  • Applications

    Borax (B4Na2O7.10H2O), CAS 1303-96-4, is a versatile chemical used across several industries: as a builder and water-softening agent in household cleaners and laundry detergents; as a flux for glass, ceramic and enamel formulations to lower processing temperatures; as a borate crosslinking activator for polymers such as polyvinyl alcohol, enabling gels, hydrogels and slime-like materials; as a boron source in agriculture fertilizers and soil amendments; as a buffering and pH-adjusting agent in some cosmetics and personal-care formulations; and as a flame-retardant additive in certain polymeric materials and textiles. Formulation use is subject to local regulations and limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 195.83
    methanol 393.59
    isopropanol 185.12
    water 280.73
    ethyl acetate 163.04
    n-propanol 148.8
    acetone 287.99
    n-butanol 114.61
    acetonitrile 213.65
    DMF 854.41
    toluene 37.09
    isobutanol 107.97
    1,4-dioxane 216.98
    methyl acetate 183.86
    THF 394.21
    2-butanone 162.58
    n-pentanol 88.56
    sec-butanol 119.55
    n-hexane 15.28
    ethylene glycol 319.03
    NMP 460.85
    cyclohexane 8.73
    DMSO 719.52
    n-butyl acetate 82.27
    n-octanol 72.7
    chloroform 69.37
    n-propyl acetate 115.29
    acetic acid 177.52
    dichloromethane 76.0
    cyclohexanone 98.31
    propylene glycol 255.77
    isopropyl acetate 116.7
    DMAc 578.5
    2-ethoxyethanol 312.25
    isopentanol 87.1
    n-heptane 14.77
    ethyl formate 156.19
    1,2-dichloroethane 80.01
    n-hexanol 85.61
    2-methoxyethanol 562.53
    isobutyl acetate 68.98
    tetrachloromethane 24.63
    n-pentyl acetate 68.45
    transcutol 319.83
    n-heptanol 67.3
    ethylbenzene 23.29
    MIBK 110.18
    2-propoxyethanol 342.6
    tert-butanol 188.83
    MTBE 101.54
    2-butoxyethanol 178.27
    propionic acid 158.53
    o-xylene 34.04
    formic acid 285.29
    diethyl ether 154.76
    m-xylene 40.39
    p-xylene 24.64
    chlorobenzene 30.2
    dimethyl carbonate 295.35
    n-octane 8.9
    formamide 414.58
    cyclopentanone 203.46
    2-pentanone 156.16
    anisole 97.91
    cyclopentyl methyl ether 154.4
    gamma-butyrolactone 286.11
    1-methoxy-2-propanol 526.47
    pyridine 103.52
    3-pentanone 136.08
    furfural 246.91
    n-dodecane 9.97
    diethylene glycol 430.42
    diisopropyl ether 62.59
    tert-amyl alcohol 115.57
    acetylacetone 196.9
    n-hexadecane 10.59
    acetophenone 91.88
    methyl propionate 229.92
    isopentyl acetate 61.64
    trichloroethylene 76.37
    n-nonanol 67.37
    cyclohexanol 68.01
    benzyl alcohol 85.47
    2-ethylhexanol 49.98
    isooctanol 50.59
    dipropyl ether 106.55
    1,2-dichlorobenzene 34.86
    ethyl lactate 172.09
    propylene carbonate 152.12
    n-methylformamide 476.62
    2-pentanol 99.26
    n-pentane 17.31
    1-propoxy-2-propanol 227.12
    1-methoxy-2-propyl acetate 167.15
    2-(2-methoxypropoxy) propanol 176.7
    mesitylene 32.67
    ε-caprolactone 112.62
    p-cymene 25.93
    epichlorohydrin 237.06
    1,1,1-trichloroethane 50.49
    2-aminoethanol 271.67
    morpholine-4-carbaldehyde 420.26
    sulfolane 309.17
    2,2,4-trimethylpentane 8.69
    2-methyltetrahydrofuran 150.65
    n-hexyl acetate 85.89
    isooctane 8.7
    2-(2-butoxyethoxy)ethanol 207.69
    sec-butyl acetate 73.83
    tert-butyl acetate 118.41
    decalin 7.44
    glycerin 429.33
    diglyme 288.39
    acrylic acid 174.86
    isopropyl myristate 55.24
    n-butyric acid 126.09
    acetyl acetate 107.79
    di(2-ethylhexyl) phthalate 52.57
    ethyl propionate 147.72
    nitromethane 418.31
    1,2-diethoxyethane 125.75
    benzonitrile 68.47
    trioctyl phosphate 51.06
    1-bromopropane 47.91
    gamma-valerolactone 274.27
    n-decanol 57.37
    triethyl phosphate 69.42
    4-methyl-2-pentanol 68.2
    propionitrile 148.57
    vinylene carbonate 144.2
    1,1,2-trichlorotrifluoroethane 212.73
    DMS 121.47
    cumene 22.22
    2-octanol 52.13
    2-hexanone 100.39
    octyl acetate 68.91
    limonene 28.48
    1,2-dimethoxyethane 378.27
    ethyl orthosilicate 62.11
    tributyl phosphate 53.49
    diacetone alcohol 179.95
    N,N-dimethylaniline 91.17
    acrylonitrile 196.41
    aniline 80.35
    1,3-propanediol 245.32
    bromobenzene 22.72
    dibromomethane 50.57
    1,1,2,2-tetrachloroethane 88.61
    2-methyl-cyclohexyl acetate 60.0
    tetrabutyl urea 79.61
    diisobutyl methanol 41.77
    2-phenylethanol 82.3
    styrene 24.83
    dioctyl adipate 72.64
    dimethyl sulfate 370.08
    ethyl butyrate 90.94
    methyl lactate 315.98
    butyl lactate 98.51
    diethyl carbonate 80.5
    propanediol butyl ether 180.77
    triethyl orthoformate 81.26
    p-tert-butyltoluene 29.18
    methyl 4-tert-butylbenzoate 118.33
    morpholine 241.52
    tert-butylamine 104.84
    n-dodecanol 48.86
    dimethoxymethane 744.65
    ethylene carbonate 126.55
    cyrene 187.58
    2-ethoxyethyl acetate 106.09
    2-ethylhexyl acetate 48.9
    1,2,4-trichlorobenzene 43.4
    4-methylpyridine 95.65
    dibutyl ether 56.1
    2,6-dimethyl-4-heptanol 41.77
    DEF 234.52
    dimethyl isosorbide 229.48
    tetrachloroethylene 60.01
    eugenol 156.61
    triacetin 117.1
    span 80 130.63
    1,4-butanediol 145.84
    1,1-dichloroethane 66.02
    2-methyl-1-pentanol 57.71
    methyl formate 383.94
    2-methyl-1-butanol 81.01
    n-decane 12.98
    butyronitrile 106.3
    3,7-dimethyl-1-octanol 54.64
    1-chlorooctane 31.34
    1-chlorotetradecane 20.1
    n-nonane 11.84
    undecane 11.26
    tert-butylcyclohexane 8.94
    cyclooctane 7.34
    cyclopentanol 115.63
    tetrahydropyran 103.47
    tert-amyl methyl ether 97.25
    2,5,8-trioxanonane 247.88
    1-hexene 32.57
    2-isopropoxyethanol 208.59
    2,2,2-trifluoroethanol 180.44
    methyl butyrate 139.35

    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