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1948-33-0

Basic Information
CAS No.: 1948-33-0
Name: tert-Butylhydroquinone
Molecular Structure:
Molecular Structure of 1948-33-0 (tert-Butylhydroquinone)
Formula: C10H14O2
Molecular Weight: 166.22
Synonyms: Hydroquinone,tert-butyl- (6CI,7CI,8CI);2-(1,1-Dimethylethyl)hydroquinone;2-(tert-Butyl)-p-hydroquinone;2-t-Butylhydroquinone;2-tert-Butyl-1,4-benzenediol;2-tert-Butyl-1,4-dihydroxybenzene;2-tert-Butyl-1,4-hydroquinone;2-tert-Butylhydroquinone;Banox 20BA;Grindox450;Keniox 20;MC-TB 20;MTBHQ;Mono-tert-butylhydroquinone;Mono-tertiarybutylhydroquinone;NSC 4972;TBHQ;Tenox 20;Tenox TBHQ;
EINECS: 217-752-2
Density: 1.086 g/cm3
Melting Point: 127-129 °C(lit.)
Boiling Point: 291.3 °C at 760 mmHg
Flash Point: 138.7 °C
Solubility: Insoluble in water
Appearance: tan powder
Hazard Symbols: HarmfulXn
Risk Codes: 22-36/37/38
Safety: 26-36-28
Transport Information: UN 3077
PSA: 40.46000
LogP: 2.39530
Synthetic route
123-31-9

hydroquinone

75-65-0

tert-butyl alcohol

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With phosphoric acid In water at 59 - 81℃; for 2h; Temperature;99.9%
With aminosulfonic acid In 1,4-dioxane; toluene at 135℃; for 8h; Temperature;50%
With phosphoric acid In water at 80℃; for 4h; Concentration; Temperature; Time; Large scale;44.8%
540-88-5

acetic acid tert-butyl ester

123-31-9

hydroquinone

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With sulfuric acid at 85℃; for 8h; Temperature; Large scale;99.9%
3602-55-9

2-tert-butyl-1,4-benzoquinone

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With (iPr4PCP)IrH4; hydrogen In toluene at 60℃; under 760.051 Torr; for 2h;99%
With palladium on activated charcoal; hydrogen In dichloromethane at 60℃; under 22502.3 Torr; for 2h; Temperature; Solvent; Pressure; Reagent/catalyst;97.3%
With 2,5-dihydrotoluene; trifluoroacetic acid In toluene at 30℃; for 2h;70%
88-18-6

2-tert-Butylphenol

A

3602-55-9

2-tert-butyl-1,4-benzoquinone

B

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With dihydrogen peroxide; Ti-superoxide In water; acetic acid at 50 - 60℃; for 1.25h; Product distribution / selectivity;A 97%
B 0.7%

2-tert-butyl-4-hydroxybenzaldehyde

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With dihydrogen peroxide In water; acetonitrile at 35℃; for 12h; Dakin Phenol Oxidation;70%
3602-55-9

2-tert-butyl-1,4-benzoquinone

100-46-9

benzylamine

A

1948-33-0

tert-butylhydroquinone

B

2-(Benzylamino)-5-(tert-butyl)1,4-benzoquinone

C

2-(Benzylamino)-6-(tert-butyl)-1,4-benzoquinone

Conditions
ConditionsYield
With oxygen In acetonitrile for 1h; Ambient temperature;A 15.6%
B 18.8%
C 65.6%
123-31-9

hydroquinone

75-65-0

tert-butyl alcohol

A

5875-45-6

2,5-di-tert-butylphenol

B

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With aminosulfonic acid In 5,5-dimethyl-1,3-cyclohexadiene at 150℃; for 4h; Temperature; Solvent;A 17.2%
B 57.8%
3602-55-9

2-tert-butyl-1,4-benzoquinone

A

1948-33-0

tert-butylhydroquinone

B

2-(Benzylamino)-5-(tert-butyl)1,4-benzoquinone

C

2-(Benzylamino)-6-(tert-butyl)-1,4-benzoquinone

Conditions
ConditionsYield
With benzylamine In acetonitrile for 1h; Ambient temperature;A 52.8%
B 6.6%
C 40.6%
123-31-9

hydroquinone

75-65-0

tert-butyl alcohol

A

6669-13-2

t-butyl phenyl ether

B

2460-77-7

2,5-di-tert-butyl-p-benzoquinone

C

88-58-4

2,5-bis(1,1-dimethylethyl)-1,4-benzenediol

D

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With porous pillared-zirconium phosphate functionalized with methyl group In 5,5-dimethyl-1,3-cyclohexadiene at 150℃; for 4h; Reagent/catalyst; Autoclave;A n/a
B n/a
C n/a
D 48.8%
With perfluorosulfonicacid-functionalized carbon nanotubes (PFSA-CNT-0.5) In 5,5-dimethyl-1,3-cyclohexadiene for 4h; Catalytic behavior; Reagent/catalyst; Autoclave;
123-31-9

hydroquinone

115-11-7

isobutene

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With phosphoric acid; xylene at 105℃;
With aluminum oxide; silica gel; xylene at 200℃;
With aluminium tris-<4-hydroxy-phenolate>; xylene at 240℃;
507-19-7

t-butyl bromide

123-31-9

hydroquinone

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
silica gel In dichloromethane at 30℃; for 24h; Product distribution;
66806-57-3

2-tert-butylsemiquinone radical

A

3602-55-9

2-tert-butyl-1,4-benzoquinone

B

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
In water at 22℃; Equilibrium constant; Rate constant; Irradiation;
123-31-9

hydroquinone

115-11-7

isobutene

A

88-58-4

2,5-bis(1,1-dimethylethyl)-1,4-benzenediol

B

2467-52-9

2-t-Butyl-4-t-butoxyphenol

C

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With Amberlyst IR120 H(1+) In diethyl ether Ambient temperature;

2-tert-butylsemiquinone radical anion

A

3602-55-9

2-tert-butyl-1,4-benzoquinone

B

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
In water at 22℃; Rate constant;
21112-37-8

1,4-dimethoxy-2-tert-butylbenzene

A

3602-55-9

2-tert-butyl-1,4-benzoquinone

B

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With ruthenium trichloride In water; acetonitrile Oxidation; Hydrolysis; Electrochemical reaction;
121-00-6

3-tert-Butyl-4-hydroxyanisole

88-32-4

3-tert-butyl-4-methoxyphenol

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With formic acid at 25℃; for 336 - 3696h; Conversion of starting material;
With formic acid for 24h; Heating / reflux;
4857-74-3

5-tert-butyl-1,2,4-trihydroxybenzene

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With hydrogen; palladium on activated charcoal
533-73-3

1,2,4-Trihydroxybenzene

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: Acidic conditions
2: hydrogen / palladium on activated charcoal
View Scheme
1634-04-4

tert-butyl methyl ether

123-31-9

hydroquinone

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With 3-(4-sulfobutylamino)propylsilanized MCM-41 In nitrobenzene at 150℃; for 0.166667h; Catalytic behavior; Temperature; Solvent; Time; Friedel-Crafts Alkylation; Microwave irradiation; Green chemistry; chemoselective reaction;
1634-04-4

tert-butyl methyl ether

123-31-9

hydroquinone

A

2444-28-2

2,6-di-tert-butyl-4-hydroxyphenol

B

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With 3-(4-sulfobutylamino)propylsilanized MCM-41 In nitrobenzene at 165℃; for 0.166667h; Friedel-Crafts Alkylation; Microwave irradiation; Green chemistry; chemoselective reaction;
1634-04-4

tert-butyl methyl ether

123-31-9

hydroquinone

A

2444-28-2

2,6-di-tert-butyl-4-hydroxyphenol

B

88-58-4

2,5-bis(1,1-dimethylethyl)-1,4-benzenediol

C

2460-87-9

4-(tert-butoxy)phenol

D

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With 3-(4-sulfobutylamino)propylsilanized MCM-41 In nitrobenzene at 150℃; for 0.133333h; Catalytic behavior; Concentration; Friedel-Crafts Alkylation; Microwave irradiation; Green chemistry; chemoselective reaction;
90784-13-7

1,4-O-di-propanoyl-t-butylhydroquinone

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With Candida antarctica lipase B In di-isopropyl ether; isopropyl alcohol at 45℃; Enzymatic reaction; regioselective reaction;
123-31-9

hydroquinone

75-65-0

tert-butyl alcohol

A

88-58-4

2,5-bis(1,1-dimethylethyl)-1,4-benzenediol

B

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With phosphoric acid In toluene at 70 - 105℃;
3602-55-9

2-tert-butyl-1,4-benzoquinone

[PdI(μ-4,5-diazafluoren-9-one)(acetato)]2

A

50890-67-0

4,5-Diazafluoren-9-one

B

3375-31-3

palladium diacetate

C

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
With acetic acid In 1,4-dioxane; tetradeuterioacetic acid at 20℃; for 24h; Equilibrium constant; Inert atmosphere; Glovebox;

[(2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline)Pd(η2-2-tert-butyl-1,4-benzoquinone)]

64-19-7

acetic acid

152506-88-2

(2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline)palladium(II) acetate

B

1948-33-0

tert-butylhydroquinone

Conditions
ConditionsYield
In chloroform-d1; tetradeuterioacetic acid at 20℃; for 16h; Equilibrium constant; Inert atmosphere; Glovebox;
67373-56-2

chlorodimethyl(1,1,2-trimethylpropyl)silane

1948-33-0

tert-butylhydroquinone

943790-10-1

2-tert-butyl-4-thexyldimethylsilanyloxyphenol

Conditions
ConditionsYield
With 1H-imidazole; dmap In dichloromethane; N,N-dimethyl-formamide at 20℃; for 7h;100%
1948-33-0

tert-butylhydroquinone

3602-55-9

2-tert-butyl-1,4-benzoquinone

Conditions
ConditionsYield
With manganese(IV) oxide In dichloromethane for 0.25h; Ambient temperature;99%
With tetra(n-butyl)ammonium dichromate(VI) In dichloromethane for 0.15h; Reflux;99%
With [(4,5-dihydro-4,4-dimethyl-2-phenyloxazole)Ru(CH3CN)4]PF6; dihydrogen peroxide In tetrahydrofuran; water at 0 - 20℃; for 0.0833333h;99%
1948-33-0

tert-butylhydroquinone

74-88-4

methyl iodide

21112-37-8

1,4-dimethoxy-2-tert-butylbenzene

Conditions
ConditionsYield
With sodium hydride In N,N-dimethyl-formamide at 40℃; for 2h;99%
With potassium carbonate In N,N-dimethyl-formamide at 60℃;88%
With sodium hydride In N,N-dimethyl-formamide at 40℃; for 4h; Inert atmosphere;83%
Stage #1: tert-butylhydroquinone With sodium hydride In dimethyl sulfoxide for 0.5h; Metallation;
Stage #2: methyl iodide In dimethyl sulfoxide Methylation;
60%
108-24-7

acetic anhydride

1948-33-0

tert-butylhydroquinone

717-47-5

4-acetoxy-2-tert-butylphenol

Conditions
ConditionsYield
With pyridine at 85℃; for 10h;98%
3282-30-2

pivaloyl chloride

1948-33-0

tert-butylhydroquinone

66549-79-9

2-tert-butyl-4-pivaloyloxyphenol

Conditions
ConditionsYield
With 1H-imidazole; dmap In dichloromethane at 0℃; for 4h; Acylation;97%
With 1H-imidazole; dmap In dichloromethane at 0 - 4℃; for 18h; Inert atmosphere;97%
13154-24-0

triisopropylsilyl chloride

1948-33-0

tert-butylhydroquinone

155135-23-2

2-(1,1-dimethylethyl)-4-(triisopropylsilyloxy)phenol

Conditions
ConditionsYield
With 1H-imidazole; dmap96%
With 1H-imidazole; dmap In dichloromethane Inert atmosphere;90%
With 1H-imidazole; dmap In dichloromethane for 15h; Ambient temperature;88%
24424-99-5

di-tert-butyl dicarbonate

1948-33-0

tert-butylhydroquinone

carbonic acid tert-butyl ester 3-tert-butyl-4-hydroxy-phenyl ester

Conditions
ConditionsYield
With 6,7-dimethoxyisoquinoline In dichloromethane at 20℃; for 10h; Inert atmosphere; chemoselective reaction;95%
99-94-5

p-Toluic acid

1948-33-0

tert-butylhydroquinone

3-(tert-butyl)-4-hydroxyphenyl 4-methylbenzoate

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine In dichloromethane for 6h;94%
105-38-4

vinyl propionate

1948-33-0

tert-butylhydroquinone

4-O-propanoyl-2-t-butylhydroquinone

Conditions
ConditionsYield
With Candida antarctica lipase B In di-isopropyl ether at 45℃; for 24h;93.3%
With lipase B from Candida antarctica, immobilized form In di-isopropyl ether at 45℃; for 72h; Enzymatic reaction; regioselective reaction;
2032-35-1

Bromoacetaldehyde diethyl acetal

1948-33-0

tert-butylhydroquinone

117516-67-3

2-tert-Butyl-4-(2,2-diethoxy-ethoxy)-phenol

Conditions
ConditionsYield
With potassium hydroxide In dimethyl sulfoxide for 6h; Heating;93%
65-85-0

benzoic acid

1948-33-0

tert-butylhydroquinone

2444-27-1

3-(tert-butyl)-4-hydroxyphenyl benzoate

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine In dichloromethane for 6h;93%
2524-67-6

4-morpholino-4-yl-phenylamine

1948-33-0

tert-butylhydroquinone

2-[(4'-morpholinophenyl)amino]-6-tert-butyl-1,4-benzoquinone

Conditions
ConditionsYield
With citrate-phosphate buffer; Myceliophthora thermophila fungal laccase; oxygen at 20℃; pH=7; Enzymatic reaction;92%
1948-33-0

tert-butylhydroquinone

74-11-3

para-chlorobenzoic acid

3-(tert-butyl)-4-hydroxyphenyl 4-chlorobenzoate

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine In dichloromethane for 6h;91%
96-49-1

[1,3]-dioxolan-2-one

1948-33-0

tert-butylhydroquinone

177539-44-5

2,2'-(2-t-butyl-1,4-phenylenedioxy)diethanol

Conditions
ConditionsYield
With sodium hydride In N,N-dimethyl-formamide at 140℃;90%
864372-43-0

[(η6-acenaphthene)manganese tricarbonyl][BF4]

1948-33-0

tert-butylhydroquinone

648442-05-1

[(η6-2-tert-butylhydroquinone)manganese tricarbonyl][BF4]

Conditions
ConditionsYield
In dichloromethane High Pressure; (N2); addn. of ligand to a soln. of manganese complex in CH2Cl2, sealing, heating to 70°C for 2 h, cooling to room temp.; filtration, washing with CH2Cl2, drying in vac.;90%
88-14-2

2-furanoic acid

1948-33-0

tert-butylhydroquinone

3-(tert-butyl)-4-hydroxyphenyl furan-2-carboxylate

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine In dichloromethane for 6h;89%
100-07-2

4-methoxy-benzoyl chloride

1948-33-0

tert-butylhydroquinone

79679-96-2

1,4 bis(4'-methoxybenzoyloxy) t-butylphenylene

Conditions
ConditionsYield
With pyridine; triethylamine for 4h;88%
tetra-n-butyl ammonium

tetra-n-butyl ammonium

1948-33-0

tert-butylhydroquinone

3602-55-9

2-tert-butyl-1,4-benzoquinone

Conditions
ConditionsYield
With hydrogenchloride In hexane; chloroform; water88%
103-82-2

phenylacetic acid

1948-33-0

tert-butylhydroquinone

3-(tert-butyl)-4-hydroxyphenyl 2-phenylacetate

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine In dichloromethane for 6h;88%
140-10-3

(E)-3-phenylacrylic acid

1948-33-0

tert-butylhydroquinone

3-(tert-butyl)-4-hydroxyphenyl cinnamate

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine In dichloromethane for 6h;85%
118-90-1

ortho-methylbenzoic acid

1948-33-0

tert-butylhydroquinone

3-(tert-butyl)-4-hydroxyphenyl 2-methylbenzoate

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine In dichloromethane for 6h;83%
1948-33-0

tert-butylhydroquinone

62-23-7

4-nitro-benzoic acid

3-(tert-butyl)-4-hydroxyphenyl 4-nitrobenzoate

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine In dichloromethane for 6h;83%
1948-33-0

tert-butylhydroquinone

914396-48-8

N-(E)-3-methylbut-1-enyl benzyl carbamate

benzyl (7-(tert-butyl)-5-hydroxy-3-isopropyl-2,3-dihydrobenzofuran-2-yl)carbamate

Conditions
ConditionsYield
With [bis(acetoxy)iodo]benzene; (R)-1,1'-spirobiindanyl-7,7'-diyl hydrogenphosphate In toluene at 20℃; for 16h; Inert atmosphere; stereoselective reaction;83%

S-benzyl (E)-(3-methylbut-1-en-1-yl)carbamothioate

1948-33-0

tert-butylhydroquinone

S-benzyl (7-(tert-butyl)-5-hydroxy-3-isopropyl-2,3-dihydrobenzofuran-2-yl)carbamothioate

Conditions
ConditionsYield
With [bis(acetoxy)iodo]benzene; (R)-1,1'-spirobiindanyl-7,7'-diyl hydrogenphosphate In toluene at 20℃; for 16h; Inert atmosphere; stereoselective reaction;83%
152506-88-2

(2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline)palladium(II) acetate

1948-33-0

tert-butylhydroquinone

[(2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline)Pd(η2-2-tert-butyl-1,4-benzoquinone)]

Conditions
ConditionsYield
In chloroform at 20℃; Inert atmosphere; Sealed tube;83%
100-39-0

benzyl bromide

1948-33-0

tert-butylhydroquinone

35292-10-5

2-(1,1-dimethylethyl)-1,4-bis(phenylmethoxy)benzene

Conditions
ConditionsYield
With potassium carbonate In acetone for 72h; Heating;82%
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Chemistry

IUPAC Name: 2-tert-Butylbenzene-1,4-diol    
Synonyms of tert-Butylhydroquinone (CAS NO.1948-33-0): 1,4-Benzenediol (1,1-dimethylethyl)- ; 2-(1,1-Dimethylethyl)-1,4-benzenediol ; 2-t-Butylhydroquinone ; 2-tert-Butyl(1,4)hydroquinone ; Mono-tert-butylhydroquinone ; tertiary-Butylhydroquinone
CAS NO: 1948-33-0
Molecular Formula: C10H14O2
Molecular Weight: 228.29
Molecular Structure:
EINECS: 217-752-2
H bond acceptors: 2
H bond donors: 2
Freely Rotating Bonds: 3
Polar Surface Area: 18.46 Å2
Index of Refraction: 1.545
Molar Refractivity: 48.4 cm3
Molar Volume: 152.9 cm3
Surface Tension: 40.2 dyne/cm
Density: 1.086 g/cm3
Flash Point: 138.7 °C
Enthalpy of Vaporization: 55.2 kJ/mol
Boiling Point: 291.3 °C at 760 mmHg
Vapour Pressure: 0.00112 mmHg at 25°C 
Melting Point: 127-129 °C(lit.)
Appearance: tan powder
Solubility: Insoluble in water
Stability: Stable. Incompatible with strong bases, strong oxidizing agents. 
Product Categories of tert-Butylhydroquinone (CAS NO.1948-33-0): Industrial/Fine Chemicals;Anthraquinones, Hydroquinones and Quinones;Alcohols;Monomers;Polymer Science;Organic Building Blocks;Oxygen Compounds;Polyols

Uses

 tert-Butylhydroquinone (CAS NO.1948-33-0) is a highly effective preservative for many edible animal fats and unsaturated vegetable oils. It is added to a wide range of foods, with highest limit (1000 mg/kg) permitted for frozen fish and fish products.
Besides it is also used industrially as a stabilizer to inhibit autopolymerization of organic peroxides. In perfumery, it is used as a fixative to lower the evaporation rate and improve stability. It is also added to lacquers, resins,varnishes and oil field additives.

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
guinea pig LD50 oral 790mg/kg (790mg/kg)   WHO Food Additives Series. Vol. 8, Pg. 26, 1975.
mouse LD50 intraperitoneal 144mg/kg (144mg/kg) BEHAVIORAL: TREMOR

BEHAVIORAL: MUSCLE WEAKNESS
Drug and Chemical Toxicology. Vol. 7, Pg. 335, 1984.
mouse LD50 oral 1gm/kg (1000mg/kg)   Kodak Company Reports. Vol. 21MAY1971,
rat LCLo inhalation 2900mg/m3/4H (2900mg/m3) SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE

BEHAVIORAL: ATAXIA

LUNGS, THORAX, OR RESPIRATION: DYSPNEA
Acute Toxicity Data. Journal of the American College of Toxicology, Part B. Vol. 1, Pg. 753, 1992.
rat LD50 intraperitoneal 300mg/kg (300mg/kg)   Journal of the American Oil Chemists' Society. Vol. 52, Pg. 53, 1975.
rat LD50 oral 700mg/kg (700mg/kg)   Journal of the American Oil Chemists' Society. Vol. 52, Pg. 53, 1975.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Safety Information about tert-Butylhydroquinone (CAS NO.1948-33-0):
Hazard Codes: HarmfulXn
Risk Statements: 22-36/37/38
R22: Harmful if swallowed. 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-28
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S28: After contact with skin, wash immediately with plenty of soap-suds. 
S36: Wear suitable protective clothing.
RIDADR: UN3077
WGK Germany: 3
RTECS: MX4375000
HazardClass: 9
PackingGroup: III
HS Code: 29072900
Poison by intraperitoneal route. Moderately toxic by ingestion and inhalation. Mutation data reported. When heated to decomposition it emits acrid smoke and irritating fumes.

Specification

General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or chemical foam. 
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Storage: Store in a cool, dry place. Store in a tightly closed container.