Does BMA mean n-butyl methacrylate or isobutyl methacrylate?

In most commercial usage the bare abbreviation means the normal isomer, n-butyl methacrylate, CAS 97-88-1. The branched isomer, isobutyl methacrylate, is a different substance with its own identifiers and a different contribution to copolymer hardness, and the tertiary isomer is different again. Because all three are abbreviated loosely in day-to-day correspondence, an order written as BMA alone is ambiguous. Write the full chemical name and the CAS number on every enquiry, purchase order and goods-inwards record.

Why must the monomer not be blanketed with pure nitrogen?

Because the stabiliser used in commercial methacrylate monomers requires dissolved oxygen to function. It intercepts radicals by a mechanism that consumes oxygen, so a drum stripped of oxygen contains an inhibitor that is chemically present and functionally absent. The correct headspace is air, or air diluted with nitrogen to a specified oxygen content, never an inert blanket. This is one of the very few cases in a chemical store where displacing oxygen makes a material more dangerous rather than less, and it catches people whose instinct is trained on flammable solvents.

How should inhibitor content be read on a certificate?

As a starting condition rather than a permanent property. The certificate reports the inhibitor level at release; that level falls in storage as the stabiliser does its job, and it falls faster in warm conditions, in light and in the presence of contamination. A long-stored drum can meet its original certificate on every other line while having very little inhibitor left. Where storage has been long or uncertain, retest the inhibitor level before charging a reactor rather than relying on the release figure.

What is popcorn polymerisation and why does it matter here?

It is a self-propagating, expanding polymer growth that forms in dead legs, vapour spaces, valve bonnets and residues where inhibitor cannot reach. Once seeded it continues under conditions that would not start a normal polymerisation, and it grows mechanically enough to jam valves and distort equipment. The controls are housekeeping controls: no unswept dead legs, no long-standing residues, no lines left full between campaigns, and clean vessels before refilling. It is not a reason to avoid methacrylate monomers, but it is a reason to design the pipework as if the monomer were reactive, because it is.

How does the butyl ester change a copolymer compared with the methyl one?

The four-carbon ester side chain is flexible and bulky, so it loosens chain packing and lowers the temperature at which the polymer softens. Against the methyl ester it gives a softer, more flexible and more extensible polymer, better adhesion and easier film formation, at the cost of hardness and block resistance. Against the corresponding acrylate it gives a harder polymer with the weathering advantage of the methacrylate backbone. Formulators use it as the soft component of an all-methacrylate system, which keeps the durability while tuning flexibility.

Was ist 4-Methyl-2-pentanone?

4-Methyl-2-pentanone ist eine chemische Verbindung, registriert unter der CAS-Nummer 108-10-1. Summenformel: C6H12O. Molmasse: 100.16 g/mol. IUPAC: 4-methylpentan-2-one.

Wie lautet die CAS-Nummer von 4-Methyl-2-pentanone?

Die CAS-Nummer von 4-Methyl-2-pentanone ist 108-10-1 — eine eindeutige Kennung des Chemical Abstracts Service (CAS).

Wie lautet die Summenformel von 4-Methyl-2-pentanone?

Summenformel: C6H12O. Molmasse: 100.16 g/mol. logP (XLogP3): 1.3. PSA: 17.1 Å².

Welche GHS-Gefahren hat 4-Methyl-2-pentanone?

Gemäß der GHS-Klassifizierung muss 4-Methyl-2-pentanone mit den folgenden Gefahrenhinweisen gekennzeichnet werden: H225 (Flüssigkeit und Dampf leicht entzündbar.), H351 (Kann vermutlich Krebs erzeugen.), H332 (Gesundheitsschädlich bei Einatmen.), H336 (Kann Schläfrigkeit und Benommenheit verursachen.), H319 (Verursacht schwere Augenreizung.).

Wo kann ich 4-Methyl-2-pentanone kaufen?

4-Methyl-2-pentanone ist in unserem Shop erhältlich. Produkt ansehen: https://epchems.online/products/4-methyl-2-pentanone/

Woher stammen die chemischen Daten für 4-Methyl-2-pentanone?

Die chemischen Daten für 4-Methyl-2-pentanone stammen aus zuverlässigen Quellen: PubChem (NIH), ChEMBL (EBI). PubChem CID: 7909. Konform mit der CLP-Verordnung (EG 1272/2008), verfügbar unter der Lizenz CC-BY 4.0.

4-Methyl-2-pentanone

Methyl Isobutyl Ketone

CAS 108-10-1 · C₆H₁₂O · MW 100.16 g/mol

Über 4-Methyl-2-pentanone

4-Methyl-2-pentanone ist eine chemische Verbindung, registriert unter der Nummer CAS 108-10-1, mit der Summenformel C₆H₁₂O, und einer Molmasse von 100.16 g/mol.

Das Molekül enthält 19 Atome, verbunden durch 18 chemische Bindungen. Der vollständige systematische IUPAC-Name dieser Verbindung lautet 4-methylpentan-2-one. Das interaktive 3D-Modell oben zeigt die räumliche Anordnung der Atome — Sie können es mit der Maus drehen, mit dem Scrollrad zoomen und zwischen den Darstellungsmodi Skelett / Ball & Stick / Space Fill wechseln.

Hinsichtlich der physikalisch-chemischen Eigenschaften der Verteilungskoeffizient logP = 1.3 (positiver Wert, lipophile Verbindung), polare Oberfläche PSA = 17.1 Å², 0 Donatoren und 1 Wasserstoffbrücken-Akzeptoren. Diese Parameter sind entscheidend für die Beurteilung der Bioverfügbarkeit und der Wechselwirkung mit Biomolekülen.

Die chemischen Daten für diese Verbindung stammen aus PubChem (NIH NLM NCBI), einer der größten chemischen Datenbanken der Welt. Alle Informationen werden automatisch aktualisiert und um GHS-Gefahrenhinweise gemäß der CLP-Verordnung (EG 1272/2008) ergänzt. Das obige Widget darf für Bildungs-, Forschungs- und kommerzielle Zwecke verwendet werden.

Physikalisch-chemische Eigenschaften

Wzór sumaryczny	C₆H₁₂O
Masa molowa	100.16 g/mol
IUPAC	4-methylpentan-2-one
SMILES	`CC(C)CC(=O)C`
InChIKey	`NTIZESTWPVYFNL-UHFFFAOYSA-N`
logP (XLogP3)	1.3
PSA	17.1 Å²
HBD / HBA	0 / 1
PubChem CID	CID 7909 ↗

GHS-Sicherheit

Sygnał: Niebezpieczeństwo

GHS02

GHS07

GHS08

H225 — Wysoce łatwopalna ciecz i pary

H351 — Podejrzewa się, że powoduje raka

H332 — Działa szkodliwie w następstwie wdychania

H336 — Może wywoływać uczucie senności lub zawroty głowy

H319 — Działa drażniąco na oczy

EUH066 — Powtarzające się narażenie może powodować wysuszanie lub pękanie skóry

Wissenschaftliche Literatur

Literatura naukowa

20 artykułów · 8 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (20 artykułów)

Wysokość słupka = liczba artykułów w roku. Hover dla szczegółów.

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The yeast IRC7 gene encodes a β-lyase responsible for production of the varietal thiol 4-mercapto-4-methylpentan-2-one in wine.

et al. (2011)

Cytowania: 81Open AccessDOI ↗PubMed ↗PDF ↗

First identification of 4-S-glutathionyl-4-methylpentan-2-one, a potential precursor of 4-mercapto-4-methylpentan-2-one, in Sauvignon Blanc juice.

et al. (2009)

Cytowania: 55$ PaywallDOI ↗PubMed ↗

Development of a routine analysis of 4-mercapto-4-methylpentan-2-one in wine by stable isotope dilution assay and mass tandem spectrometry.

et al. (2014)

Cytowania: 12$ PaywallDOI ↗PubMed ↗

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Validation of a nanoliquid chromatography-tandem mass spectrometry method for the identification and the accurate quantification by isotopic dilution of glutathionylated and cysteinylated precursors of 3-mercaptohexan-1-ol and 4-mercapto-4-methylpentan-2-one in white grape juices.

et al. (2010)

Cytowania: 16Open AccessDOI ↗PubMed ↗PDF ↗

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RIFM fragrance ingredient safety assessment, 4-methyl-2-pentanone, CAS Registry Number 108-10-1.

et al. (2019)

Cytowania: 2Open AccessDOI ↗PubMed ↗PDF ↗

Toxicology and carcinogenesis studies of methyl isobutyl ketone (Cas No. 108-10-1) in F344/N rats and B6C3F1 mice (inhalation studies).

(2007)

Cytowania: 4$ PaywallPubMed ↗

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Localization of a defensive volatile 4-hydroxy-4-methylpentan-2-one in the capitate glandular trichomes of <i>Oenothera glazioviana</i>.

et al. (2017)

Cytowania: 4Open AccessDOI ↗PubMed ↗PDF ↗

Phase Equilibria in 4-Methylpentan-2-one-Water and 4-Methylpentan-2-one-4-Methylpentan-2-ol Systems and Their Thermodynamic Description

Karel Řehák, Jaroslav Matouš, Josef P. Novák et al. (2000) · Collection of Czechoslovak Chemical Communications

Cytowania: 4$ PaywallDOI ↗

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Analysis of 4-mercapto-4-methylpentan-2-one in sake presented at the Sake Contest

Sachiko IIZUKA, Atsuko ISOGAI, Ryoko KANDA et al. (2019) · JOURNAL OF THE BREWING SOCIETY OF JAPAN

Cytowania: 3Open AccessDOI ↗PDF ↗

Volumetric Properties of the Mixture 4-Methylpentan-2-one C6H12O + C6H12O2 4-Hydroxy-4-methylpentan-2-one (LB2753, VMSD1111)

I. Cibulka, L. Hnědkovský, J.-C. Fontaine et al. (2009) · Landolt-Börnstein - Group IV Physical Chemistry

$ PaywallDOI ↗

Volumetric Properties of the Mixture 4-Methylpentan-2-one C6H12O + C6H12O2 4-Hydroxy-4-methylpentan-2-one (LB2764, VMSD1212)

I. Cibulka, L. Hnědkovský, J.-C. Fontaine et al. (2009) · Landolt-Börnstein - Group IV Physical Chemistry

$ PaywallDOI ↗

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Synthesis of 2-aminopyridine Lactones and Studies of Their Antioxidant, Antibacterial and Antifungal Properties

Fadila Salhi, Nawel Cheikh, Didier Villemin et al. (2021) · Chemistry Proceedings

Cytowania: 3Open AccessDOI ↗PDF ↗

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A S-cysteine conjugate, precursor of aroma of White Sauvignon

Takatoshi Tominaga, Isabelle Masneuf-Pomarède, Denis Dubourdieu (1995) · OENO One

Cytowania: 10Open AccessDOI ↗PDF ↗

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Evidence of the Possible Interaction between Ultrasound and Thiol Precursors.

Roman T, Tonidandel L, Nicolini G et al. (2020) · Foods (Basel, Switzerland)

Cytowania: 17Open AccessDOI ↗PubMed ↗PDF ↗

Identification of 4-mercapto-4-methylpentan-2-one as the characteristic aroma of sake made from low-glutelin rice.

Iizuka-Furukawa S, Isogai A, Kusaka K et al. (2017) · Journal of bioscience and bioengineering

$ PaywallDOI ↗PubMed ↗

Unravelling glutathione conjugate catabolism in Saccharomyces cerevisiae: the role of glutathione/dipeptide transporters and vacuolar function in the release of volatile sulfur compounds 3-mercaptohexan-1-ol and 4-mercapto-4-methylpentan-2-one.

Cordente AG, Capone DL, Curtin CD (2015) · Applied microbiology and biotechnology

$ PaywallDOI ↗PubMed ↗

Refractive index of 4-methylpentan-2-one

Christian Wohlfarth (2017) · Optical Constants

$ PaywallDOI ↗

Refractive index of 4-hydroxy-4-methylpentan-2-one

Christian Wohlfarth (2017) · Optical Constants

$ PaywallDOI ↗

Viscosity of 4-hydroxy-4-methylpentan-2-one

Christian Wohlfarth (2017) · Viscosity of Pure Organic Liquids and Binary Liquid Mixtures

$ PaywallDOI ↗

Viscosity of 4-methylpentan-2-one

Christian Wohlfarth (2017) · Viscosity of Pure Organic Liquids and Binary Liquid Mixtures

$ PaywallDOI ↗

Dane z PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary wygenerowane przez Semantic Scholar TLDR. Artykuły z ikoną wymagają płatnego dostępu.

Synonyme

4-Methyl-2-pentanone · METHYL ISOBUTYL KETONE · 4-Methylpentan-2-one · 108-10-1 · Isopropylacetone · Isobutyl methyl ketone · Hexone · MIBK · 2-Pentanone, 4-methyl- · 2-Methyl-4-pentanone · Shell mibk · 4-Methyl-2-oxopentane · Methylisobutylketon · Isohexanone · Hexon

Datenquellen

📊 PubChem CID 7909 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

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