Melting point :-2.8 °C
Boiling point :37 °C (15 mmHg)
Density :0.937 g/mL at 20 °C
vapor pressure :62 mmHg at 45 °C
refractive index :n20/D 1.403
Flash point :85 °F
storage temp. :2-8°C
form :Liquid
pka :pK1: 12.80 (25°C)
color :Clear colorless
Water Solubility :Miscible
Merck :14,1570
BRN :1098280
Exposure limits :No exposure limit is set. On the basis of its irritant properties a ceiling limit of 1.2 mg/m³ (0.3 ppm) is recommended.
Stability :Stable, but may explode if heated under confinement. Decomposition may be accelerated by traces of metals, molecular sieve or other contaminants. Incompatible with reducing agents, combustible material, acids.
InChIKey :CIHOLLKRGTVIJN-UHFFFAOYSA-N
LogP :1.230 (est)
CAS DataBase Reference :75-91-2(CAS DataBase Reference)
NIST Chemistry Reference :Tert-butyl hydroperoxide(75-91-2)
EPA Substance Registry System :tert-Butyl hydroperoxide (75-91-2)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning H242 Heating may cause a fire Self-reactive substances and mixtures; and Organic peroxides Type C, D,Type E, F Type G Danger Warning P210, P220, P234, P280, P370+P378,P403+P235, P411, P420, P501 H300 Fatal if swallowed Acute toxicity,oral Category 1, 2 Danger P264, P270, P301+P310, P321, P330,P405, P501 H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger H310 Fatal in contact with skin Acute toxicity,dermal Category 1, 2 Danger P262, P264, P270, P280, P302+P350,P310, P322, P361, P363, P405, P501 H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, P405, P501 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310 H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501 H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501 H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501 H371 May cause damage to organs Specific target organ toxicity, single exposure Category 2 Warning P260, P264, P270, P309+P311, P405,P501 H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501 H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:	P201 Obtain special instructions before use. P202 Do not handle until all safety precautions have been read and understood. P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P220 Keep/Store away from clothing/…/combustible materials. P233 Keep container tightly closed. P234 Keep only in original container. P240 Ground/bond container and receiving equipment. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P284 Wear respiratory protection. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P310 Immediately call a POISON CENTER or doctor/physician. P320 Specific treatment is urgent (see … on this label). P331 Do NOT induce vomiting. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up. P410 Protect from sunlight.