If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
M80903
α-méthylstyrène
99%, contains 15 ppm p-tert-butylcatechol as inhibitor
Synonyme(s) :
2-phénylpropène, Isopropénylbenzène
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A propos de cet article
vapor density
4.1 (vs air)
Quality Segment
vapor pressure
2.1 mmHg ( 20 °C)
assay
99%
form
liquid
autoignition temp.
1065 °F
contains
15 ppm p-tert-butylcatechol as inhibitor
expl. lim.
6.1 %
refractive index
n
bp
165-169 °C (lit.)
mp
−24 °C (lit.)
density
0.909 g/mL at 25 °C (lit.)
storage temp.
2-8°C
SMILES string
CC(=C)c1ccccc1
InChI
1S/C9H10/c1-8(2)9-6-4-3-5-7-9/h3-7H,1H2,2H3
InChI key
XYLMUPLGERFSHI-UHFFFAOYSA-N
General description
Application
- comme monomère pour préparer le monomère “phène” utilisé dans des composites de résines dentaires photopolymérisables afin de réduire leur retrait durant la polymérisation. L'α-méthylstyrène présente une faible concentration en doubles liaisons adaptée à la préparation de composites en résine à faible retrait volumétrique et résilients aux contraintes dues au retrait.
- comme monomère pour préparer du poly(α-méthylstyrène), un polymère pouvant servir d'additif dans la fabrication de transistors organiques en couches minces. Ce polymère favorise la croissance de cristaux semiconducteurs uniformément alignés avec une bien meilleure orientation.
- comme précurseur pour synthétiser des 3,4-dihydropyranes présentant un potentiel thérapeutique.
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Cet article | |||
|---|---|---|---|
| description 99%, contains 15 ppm p-tert-butylcatechol as inhibitor | description (stabilised with 4-tert-butylpyrocatechol) for synthesis | description 60% meta, 40% para and 1% ortho, 99%, contains ~50 ppm 4-tert-butylcatechol as inhibitor | description contains 500 ppm tert-Butylcatechol as stabilizer, 98% |
| assay 99% | assay ≥99.0% (GC) | assay 99% | assay 98% |
| density 0.909 g/mL at 25 °C (lit.) | density 0.91 g/cm3 at 20 °C | density 0.893 g/mL at 25 °C (lit.) | density 0.904 g/mL at 25 °C (lit.) |
| storage temp. 2-8°C | storage temp. 2-30°C | storage temp. 2-8°C | storage temp. 2-8°C |
| vapor density 4.1 (vs air) | vapor density - | vapor density - | vapor density - |
| contains 15 ppm p-tert-butylcatechol as inhibitor | contains - | contains ~50 ppm 4-tert-butylcatechol as inhibitor | contains 500 ppm tert-Butylcatechol as stabilizer |
| mp −24 °C (lit.) | mp -23 °C | mp - | mp −35 °C (lit.) |
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signalword
Danger
Hazard Classifications
Aquatic Chronic 2 - Asp. Tox. 1 - Eye Irrit. 2 - Flam. Liq. 3 - Repr. 2 - Skin Sens. 1B - STOT SE 3
target_organs
Respiratory system
Classe de stockage
3 - Flammable liquids
wgk
WGK 2
flash_point_f
114.8 °F - closed cup
flash_point_c
46 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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