Sulfur

Overview IFRA Request a quote

  • Identifiers

    Molecular formula
    S

    SMILES
    S

    Safety labels

    Irritant
    Irritant

  • Properties

    XLogP3-AA
    0.5

    Molecular weight
    32.07 g/mol

    Melting point expt.

    • 95.3 °C /(Sulfur rhombic transforms to monoclinic)/; 115.21 °C /Sulfur (monoclinic)/
    • Ignites in air above 261 °C, in oxygen below 260 °C, burning to the dioxide; combines readily with hydrogen; combines in the cold with fluorine, chlorine, and bromine; combines with carbon at high temperatures; reacts with silicon, phosphorus, arsenic, antimony and bismuth at their melting points; combines with nearly all metals; with lithium, sodium, potassium, copper, mercury and silver in the cold on contact with the solid; with magnesium, zinc and cadmium very slightly in the cold, more readily on heating; with other metals at high temperatures. Does not react with iodine, nitrogen, tellurium, gold, platinum and iridium.
    • MP: 106.8 °C /gamma-Sulfur/
    • 120 °C (amorphous)

    Boiling point

    • 444.61 °C
    • 445 °C

    Flash point

    • 405 °F (207 °C) (Closed cup)
    • 160 °C c.c.

    Solubility expt.

    • For more Solubility (Complete) data for Sulfur, Elemental (13 total), please visit the HSDB record page.
    • For more Solubility (Complete) data for Sulfur, Elemental (13 total), please visit the HSDB record page.
    • Insoluble in water; slightly soluble in ethanol, benzene, ethyl ether; soluble in carbon disulfide /Sulfur (rhombic)/
    • Insoluble in water; slightly soluble in ethanol, benzene, ethyl ether; soluble in carbon disulfide /Sulfur (monoclinic)/
    • Insoluble in water. Sparingly soluble in alcohol, in ether; soluble in carbon disulfide (one gram/2 mL), in toluene
    • Liquid ammonia (anhydrous) dissolves 38.5% sulfur at -78 °C; acetone dissolves 2.65% at 25 °C; methylene iodide dissolves 9.1% at 10 °C; chloroform dissolves about 1.5% at 18 °C
    • Soluble in carbon disulfide, benzene, warm aniline and carbon tetrachloride, and liquid ammonia.
    • Solubility in water: none

  • Synonyms

    • Anacardium
    • Bioelements
    • Armarita
    • Celesty
    • Naturasil
    • Prosacea
    • Sulfaderm
    • DermaWash
    • Motto
    • Acne Treatment
    • alpha-Sulfur
    • Spot Correction
    • Sulfur-Lavender
    • Sulfur Lotion
    • Amino Mask
    • Dermaline Sulfur
    • Sulfo lo
    • sulfur suspension
    • Zinc Cream
    • Malin and Goetz
    • Clean Kit
    • Dr Berrys
    • Spai-Sons
    • Spot Defy
    • Naturasil Scabies
    • Acne LotionSulfur
    • PowerSpot Cleanse
    • Rodan and Fields
    • Acne Therapy Bar
    • Clinicians Complex
    • DermaWash S2
    • Sulfur 6
    • Acne Drying Lotion
    • Acne Sulfur Lotion
    • Proactiv Clean Kit
    • Skin Rashes Eczema
    • Sulfur 3X
    • Sulfur Facial Wash
    • Sulphur Kit Refill
    • Aqua KAVI
    • Sulphur 12X
    • Sulphur 30C
    • Treatment 101
    • 50 Remedy Kit
    • Sulfur 16
    • Sulfur-16
    • LIQUIMAT
    • Margarite Zinc Cream
    • SULFER
    • Sulphur 200C
    • 100 Remedy Kit
    • Naturasil Nail Fungus
    • Sulfur Spot Treatment
    • EradiKate Facial Mask
    • ACNE THERAPY
    • Sulphur 7138
    • Amino Mask Bioelements
    • Bioelements Amino Mask
    • COAT SILK
    • DEEP ACNE
    • Sulfur 3% Soap Bar
    • Naturasil Mite B Gone
    • END-ZIT
    • RefChem:6274
    • Therapeutic Sulfur Mask
    • DHC Acne Spot Therapy
    • Naturasil Mite Be Gone
    • RoyceDerm Sulfur Soap.
    • caring mill Acne Drying
    • Sulfur 3 Special Order
    • SULPHUR 200ck
    • Overnight Spot Treatment
    • Renu Laboratories Drying
    • Super-Sulfur Magic Mask
    • Vivant Sulfur Clay Mask
    • Acne LotionSulfur Sulfur
    • NAIL REVIVE SERUM
    • Calm Eczema Therapy Wash
    • Concealing Spot Treatment
    • Naturasil Sulfur-Lavender
    • Organic Sulfur Suspension
    • CLIXIT ACNE DRYING
    • Dermaharmony 10% Sulfur
    • Sulfur 30 Special Order
    • Acne Clearing Sulfur Mask
    • Calm Eczema Therapy Cream
    • Naturasil Tinea Versicolor
    • MINERAL BLEMISH KIT
    • NERD ACNE TREATMENT
    • SULFUR CALMING MASK
    • Acne Treatment with Sulfur
    • Joesoef Skincare Anti Acne
    • SULFUR 3%
    • Sulfur, Thuja Occidentalis
    • ADARA Acne 911 Drying
    • UNBLEMISH Clarifying Mask
    • bareMinerals Blemish Therapy
    • DRx Blemish Clarifying Mask
    • ELFMineral Blemish Kit Box
    • EradiKate ACNE TREATMENT
    • 30C Homeopathic Remedy Kit
    • SULFUR ACNE TREATMENT
    • Acne Control Clarifying Mask
    • Proactiv Skin Purifying Mask
    • Sulfur Acne Foaming Cleanser
    • Derma E Acne Clarifying Mask
    • Sulfur and Thuja Occidentalis
    • 200C Homeopathic Remedy Kit
    • HEALHY PAW LIFE SULFUR
    • ZO Skin Health Sulfur Masque
    • Kalium Sulfuratum Bath Essence
    • Proactiv Clean Beginner Bundle
    • Rapid Relief Acne Sulfur Mask
    • Terrasil Rapid-Clear Psoriasis
    • Salicylic Acid, Thuja, Sulfur
    • Activ O2 Acne Treatment Cream
    • Malin and Goetz Acne Treatment
    • SLMD Silver Sulfur Acne Cream
    • caring mill Acne Spot Treatment
    • QUICK DRY ACNE TREATMENT
    • DTXCID7014941
    • Earths Care Acne Spot Treatment
    • Earths Care Acne Treatment Mask
    • Game Over Acne Drying Treatment
    • EradiKate Daily Foaming Cleanser
    • SEACALL NAIL REVIVE SERUM
    • Bestmade Natural Products Sulphur
    • 7704-34-9

  • Applications

    Sulfur (CAS number: ) is an essential feedstock and intermediate used across multiple industries. In industrial manufacturing, it is a primary input for sulfuric acid production via the contact process, supporting fertilizer, chemical, and refining sectors. It also serves as the vulcanizing agent for rubber and as a precursor for sulfur-containing polymers and elastomers. In agriculture, elemental sulfur and sulfur compounds supply plant nutrition and are used in soil amendments and certain formulations. In pharmaceuticals and fine chemicals, sulfur acts as a starting material or intermediate in the synthesis of sulfur-containing compounds, including sulfonates and thio derivatives. In cosmetics and personal care, sulfur is used in some formulations for functional performance in skincare and shampoos. All uses are subject to local regulations and formulation limits.

    gpt-5-nano

1 3

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