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Sulfur and phosphorus compounds

Santonox

Also known as 4,4'-Thiobis(6-tert-butyl-m-cresol), Sumilizer WX, Santonox BM

CAS 96-69-5Formula C22H30O2SMolar mass 358.55 g/molEC 202-525-2
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 32 suppliers listed
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Santonox chemical structure, C22H30O2S, CAS 96-69-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Light grey powder
Melting point
150 °C
Density
1.1 at 77 °F - Denser than water, will sink
Flash point
215.6 °C
Solubility
VERY SOL IN METHANOL (79%), SOL IN ACETONE (20%), SLIGHTLY SOL IN BENZENE (5%), VERY SLI…
HS code
293090
Category
Sulfur and phosphorus compounds
Illustrative photo, off-white crystalline powder in fibre drums in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Santonox?

Plain description, key identifiers and synonyms

4,4'-thiobis(6-tert-butyl-m-cresol) appears as white or light gray to tan powder. (NTP, 1992)

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol
CAS number
96-69-5 CAS number cross-checked
EC number
202-525-2
Molecular formula
C22H30O2S
UNII
3CA5G9822V
MDL number
MFCD00026287
InChIKey
HXIQYSLFEXIOAV-UHFFFAOYSA-N
InChI
InChI=1S/C22H30O2S/c1-13-9-17(23)15(21(3,4)5)11-19(13)25-20-12-16(22(6,7)8)18(24)10-14(20)2/h9-12,23-24H,1-8H3
SMILES (canonical and isomeric)
CC1=CC(=C(C=C1SC2=CC(=C(C=C2C)O)C(C)(C)C)C(C)(C)C)O

Synonyms

  • 4,4'-Thiobis(6-tert-butyl-m-cresol)
  • Sumilizer WX
  • Santonox BM
  • Yoshinox SR
  • Thioalkofen MBCh
  • Thioalkofen BMCH
  • Sumilizer WX-R
  • Santowhite crystals
  • Santonox R
  • Disperse MB-61
  • Thioalkofen BM 4
  • Antioxidant AO
  • Thioalkophene BM-4
  • Yoshinox S
  • Usaf B-15
  • Nonflex BPS
  • 4,4'-Thiobis(2-tert-butyl-5-methylphenol)
  • Antage Crystal
  • Nocrac 300
  • Antioxidant TMB 6
  • Ultranox 236
  • Lowinox 44S36
  • Bis(3-tert-butyl-4-hydroxy-6-methylphenyl) sulfide
  • Bis(4-hydroxy-5-tert-butyl-2-methylphenyl) sulfide
  • 4,4'-Thiobis(6-tert-butyl-3-methylphenol)
Show all 38 synonyms
  • 6,6'-Di-tert-butyl-4,4'-thiodi-m-cresol
  • 1,1'-Thiobis(2-methyl-4-hydroxy-5-tert-butylbenzene)
  • m-Cresol, 4,4'-thiobis(6-tert-butyl-
  • m-Cresol, 4,4'-thiobis[6-tert-butyl-
  • 4,4'-Thiobis(2-(1,1-dimethylethyl)-5-methylphenol)
  • 4-06-00-06043 (Beilstein Handbook Reference)
  • 4,4'-Thiobis[6-tert-butyl-m-cresol]
  • 4,4-Thio-bis-2-tertbutyl-5-methylphenol
  • Thiobis(6-tert-butyl-m-cresol), 4,4'-
  • 4,4'-thiobis[2-(1,1-dimethylethyl)-5-methylphenol]
  • thioalkofen bm4
  • 4,4'-thiobis[2-tert-butyl-5-methylphenol]
  • 4,4'-thiobis[6-tert-butyl-3-methylphenol]

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Light grey powderexp.
Odour
Slightly aromatic odor.exp.
Melting point
150 °Cexp.
Density
1.1 at 77 °F - Denser than water, will sinkexp.
Flash point
215.6 °Cexp.
Solubility
VERY SOL IN METHANOL (79%), SOL IN ACETONE (20%), SLIGHTLY SOL IN BENZENE (5%), VERY SLIGHTLY SOL IN WATER (0.08%)exp.
Vapour pressure
6.3e-07 mmHg at 158 °Fexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
358.55 g/molcalc.
Exact mass
358.1967 Dacalc.
LogP (octanol/water)
6.46calc.
Topological polar surface area
40.46 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
2calc.
Heavy atoms
25calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.46calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc(Sc2ccccc2)cc1

c1ccc(Sc2ccccc2)cc1

2 rings, 13 atoms, the Diphenyl sulfide ring system.

1,872 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H317May cause an allergic skin reaction.
  • H319Causes serious eye irritation.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (13)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Santonox suppliers

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All 32 suppliers
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Where suppliers are based

32 suppliers in 6 countries

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Santonox price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Used as an antioxidant for polyolefines (high- and low-pressure polyethylenes, polypropylene).

Antioxidant for synthetic rubbers & latexes.

Antioxidant for natural rubber & latex.

Stabilizer for polyethylene, eg, food packaging films.

Antioxidant for vinyl polymers.

Industrial uses: UV stabilizer, Antioxidant, Stabilizing agent.

Use classes: Plastics.

Functional uses

  • Antioxidant
  • Processing aids not otherwise specified
  • Reducing agent

How it is made

Probably by reaction of sulfur dichloride with 6-t-butyl-m-cresol

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Santonox is traded under.

HS 2930.90Indicative HS code

Organo-sulphur compounds, other

World exports in 2024
$5.83B
+0.1% vs 2023, imports $5.93B
2019 to 2024
Top exporters
  1. China40.7%
  2. United States10.9%
  3. Japan9.3%
Top importers
  1. United States13.3%
  2. Brazil12.6%
  3. China6.6%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Santonox is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Santonox, based on the data on this page

What is Santonox?

4,4'-thiobis(6-tert-butyl-m-cresol) appears as white or light gray to tan powder. (NTP, 1992)

What is the CAS number of Santonox?

The CAS registry number of Santonox is 96-69-5.

What is the molecular formula and weight of Santonox?

The molecular formula of Santonox is C22H30O2S and its molar mass is 358.55 g/mol.

What is Santonox used for?

Used as an antioxidant for polyolefines (high- and low-pressure polyethylenes, polypropylene). Antioxidant for synthetic rubbers & latexes. Antioxidant for natural rubber & latex. Stabilizer for polyethylene, eg, food packaging films. Antioxidant for vinyl polymers.

Is Santonox hazardous?

Santonox carries the GHS signal word "Warning". Main hazards: may cause an allergic skin reaction, causes serious eye irritation, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Santonox?

Santonox is usually classified under HS code 293090 (Organo-sulphur compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Santonox?

CompoundList lists 32 suppliers of Santonox in China, United States, Japan, Brazil and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Santonox?

Suppliers quote Santonox on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Santonox

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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