Rongalite

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  • Identifiers

    CAS number
    149-44-0

    Molecular formula
    CH4NaO3S

    SMILES
    C(O)S(=O)O.[Na]

    Safety labels

    Health Hazard
    Health

  • Odor profile

    Fragrance
    Odorless 63.34%
    Sulfurous 50.27%
    Meaty 32.86%
    Savory 29.56%
    Roasted 24.2%
    Cooked 23.17%
    Onion 22.19%
    Alliaceous 21.71%
    Garlic 20.5%
    Burnt 18.15%

     

    Flavor
    Odorless 62.24%
    Sour 31.14%
    Acidic 25.07%
    Bland 23.35%
    Pungent 23.24%
    Formyl 22.41%
    Mild 22.09%
    Very mild 21.57%
    Soy 21.26%
    Yeast 21.23%

     

    Odor impact est.
    High

  • Properties

    pKa est.
    3.33 (weak acid)

    Molecular weight
    119.1 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    302°C

    Melting point expt.

    • 63-64 °C

    Flash point

    • 143.79 ˚C est.

    Solubility expt.

    • White solid; sol in water and alcohol /dihydrate/
    • FREELY SOL IN WATER; PRACTICALLY INSOL IN ETHER; PRACTICALLY INSOL IN DEHYDRATED ALCOHOL AND BENZENE
    • PRACTICALLY INSOL IN DEHYDRATED ALC & BENZENE

  • Synonyms

    • Aldanil
    • Discolite
    • Formopan
    • Hydrolit
    • Leptacid
    • Leptacit
    • Rodite
    • Bleachit D
    • Rongalit C
    • Rongalite C
    • Superlite C
    • Hydrosulfite AWC
    • Redol C
    • Sodium methanalsulfoxylate
    • Natrium hydroxymethansulfinat
    • Natrium formaldehydesulfoxylat
    • Oxymethansulfinsaeuren natrium
    • Formaldehyde sodium sulfoxylate
    • Sodium sulfoxylate formaldehyde
    • Sodium (hydroxymethyl)sulfinate
    • SODIUM FORMALDEHYDESULFOXYLATE
    • Hydroxymethansulfinsaeure, natriumsalz
    • Formaldehydesulfoxylic acid sodium salt
    • RefChem:930878
    • 149-44-0
    • Hydroxymethanesulfinic acid sodium salt
    • Rongalit
    • Rongalite
    • SCHEMBL30017140
    • 149-44-0

  • Applications

    Rongalite (sodium formaldehyde sulfoxylate, CAS 149-44-0) is a mild reducing agent used in several industrial applications. In textile chemistry, it serves as a reducing agent for vat dyes and sulfur dyes, enabling color development and fixation in dyeing processes. In the pulp and paper sector, it is employed in bleaching and color-removal steps to adjust brightness and remove pigments. It also functions as an intermediate and processing aid in organic synthesis, and may act as a decolorizing or color-modifying agent in coatings and inks formulations. Its use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 60.39
    methanol 193.66
    isopropanol 20.14
    water 2514.76
    ethyl acetate 3.32
    n-propanol 24.19
    acetone 35.98
    n-butanol 14.47
    acetonitrile 12.42
    DMF 340.49
    toluene 0.79
    isobutanol 9.75
    1,4-dioxane 18.52
    methyl acetate 5.65
    THF 19.3
    2-butanone 7.86
    n-pentanol 7.37
    sec-butanol 9.73
    n-hexane 0.53
    ethylene glycol 227.96
    NMP 103.87
    cyclohexane 2.01
    DMSO 352.86
    n-butyl acetate 2.02
    n-octanol 3.14
    chloroform 1.21
    n-propyl acetate 2.56
    acetic acid 160.36
    dichloromethane 2.27
    cyclohexanone 10.09
    propylene glycol 71.86
    isopropyl acetate 2.48
    DMAc 100.78
    2-ethoxyethanol 51.69
    isopentanol 8.01
    n-heptane 1.41
    ethyl formate 15.66
    1,2-dichloroethane 2.96
    n-hexanol 4.59
    2-methoxyethanol 147.67
    isobutyl acetate 0.92
    tetrachloromethane 1.02
    n-pentyl acetate 2.27
    transcutol 41.96
    n-heptanol 4.39
    ethylbenzene 0.49
    MIBK 3.23
    2-propoxyethanol 20.74
    tert-butanol 18.13
    MTBE 3.05
    2-butoxyethanol 17.21
    propionic acid 24.19
    o-xylene 1.35
    formic acid 660.54
    diethyl ether 4.39
    m-xylene 0.87
    p-xylene 0.66
    chlorobenzene 0.5
    dimethyl carbonate 8.64
    n-octane 0.62
    formamide 627.15
    cyclopentanone 17.04
    2-pentanone 6.25
    anisole 2.18
    cyclopentyl methyl ether 5.6
    gamma-butyrolactone 20.94
    1-methoxy-2-propanol 52.36
    pyridine 6.61
    3-pentanone 4.09
    furfural 31.96
    n-dodecane 0.36
    diethylene glycol 63.78
    diisopropyl ether 1.39
    tert-amyl alcohol 10.32
    acetylacetone 11.86
    n-hexadecane 0.36
    acetophenone 3.2
    methyl propionate 5.38
    isopentyl acetate 1.39
    trichloroethylene 2.75
    n-nonanol 2.88
    cyclohexanol 8.67
    benzyl alcohol 5.08
    2-ethylhexanol 2.23
    isooctanol 2.93
    dipropyl ether 3.5
    1,2-dichlorobenzene 0.6
    ethyl lactate 6.26
    propylene carbonate 7.06
    n-methylformamide 186.05
    2-pentanol 5.96
    n-pentane 1.02
    1-propoxy-2-propanol 11.89
    1-methoxy-2-propyl acetate 3.98
    2-(2-methoxypropoxy) propanol 12.11
    mesitylene 1.0
    ε-caprolactone 8.45
    p-cymene 0.92
    epichlorohydrin 9.9
    1,1,1-trichloroethane 0.81
    2-aminoethanol 152.71
    morpholine-4-carbaldehyde 95.99
    sulfolane 47.08
    2,2,4-trimethylpentane 0.42
    2-methyltetrahydrofuran 6.86
    n-hexyl acetate 2.19
    isooctane 0.28
    2-(2-butoxyethoxy)ethanol 18.87
    sec-butyl acetate 1.17
    tert-butyl acetate 2.89
    decalin 0.41
    glycerin 189.12
    diglyme 38.2
    acrylic acid 44.36
    isopropyl myristate 1.08
    n-butyric acid 18.39
    acetyl acetate 3.68
    di(2-ethylhexyl) phthalate 1.83
    ethyl propionate 2.11
    nitromethane 133.87
    1,2-diethoxyethane 5.11
    benzonitrile 2.05
    trioctyl phosphate 1.72
    1-bromopropane 0.98
    gamma-valerolactone 40.0
    n-decanol 2.3
    triethyl phosphate 1.92
    4-methyl-2-pentanol 2.93
    propionitrile 4.41
    vinylene carbonate 8.4
    1,1,2-trichlorotrifluoroethane 30.36
    DMS 2.01
    cumene 0.52
    2-octanol 2.26
    2-hexanone 2.66
    octyl acetate 1.63
    limonene 1.49
    1,2-dimethoxyethane 42.94
    ethyl orthosilicate 1.93
    tributyl phosphate 1.57
    diacetone alcohol 12.82
    N,N-dimethylaniline 3.53
    acrylonitrile 9.24
    aniline 3.58
    1,3-propanediol 102.68
    bromobenzene 0.29
    dibromomethane 1.33
    1,1,2,2-tetrachloroethane 2.67
    2-methyl-cyclohexyl acetate 1.66
    tetrabutyl urea 4.31
    diisobutyl methanol 2.08
    2-phenylethanol 3.18
    styrene 0.58
    dioctyl adipate 2.21
    dimethyl sulfate 19.58
    ethyl butyrate 2.53
    methyl lactate 19.04
    butyl lactate 5.05
    diethyl carbonate 1.65
    propanediol butyl ether 18.46
    triethyl orthoformate 2.6
    p-tert-butyltoluene 0.98
    methyl 4-tert-butylbenzoate 5.68
    morpholine 27.74
    tert-butylamine 7.4
    n-dodecanol 1.92
    dimethoxymethane 46.44
    ethylene carbonate 6.37
    cyrene 16.43
    2-ethoxyethyl acetate 3.56
    2-ethylhexyl acetate 1.01
    1,2,4-trichlorobenzene 0.73
    4-methylpyridine 4.35
    dibutyl ether 1.96
    2,6-dimethyl-4-heptanol 2.08
    DEF 21.4
    dimethyl isosorbide 12.78
    tetrachloroethylene 3.64
    eugenol 8.28
    triacetin 3.95
    span 80 10.17
    1,4-butanediol 40.45
    1,1-dichloroethane 1.04
    2-methyl-1-pentanol 3.91
    methyl formate 96.07
    2-methyl-1-butanol 7.37
    n-decane 0.53
    butyronitrile 4.03
    3,7-dimethyl-1-octanol 2.01
    1-chlorooctane 0.76
    1-chlorotetradecane 0.45
    n-nonane 0.58
    undecane 0.42
    tert-butylcyclohexane 0.25
    cyclooctane 1.0
    cyclopentanol 13.54
    tetrahydropyran 6.81
    tert-amyl methyl ether 2.99
    2,5,8-trioxanonane 28.6
    1-hexene 0.76
    2-isopropoxyethanol 17.34
    2,2,2-trifluoroethanol 91.9
    methyl butyrate 4.29

    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