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.

Che cos'è 4-Methyl-2-pentanone?

4-Methyl-2-pentanone è un composto chimico registrato con il numero CAS 108-10-1. Formula bruta: C6H12O. Massa molare: 100.16 g/mol. IUPAC: 4-methylpentan-2-one.

Qual è il numero CAS di 4-Methyl-2-pentanone?

Il numero CAS di 4-Methyl-2-pentanone è 108-10-1 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di 4-Methyl-2-pentanone?

Formula bruta: C6H12O. Massa molare: 100.16 g/mol. logP (XLogP3): 1.3. PSA: 17.1 Å².

Quali sono i pericoli GHS di 4-Methyl-2-pentanone?

Secondo la classificazione GHS, 4-Methyl-2-pentanone deve riportare le seguenti indicazioni di pericolo: H225 (Liquido e vapori facilmente infiammabili.), H351 (Sospettato di provocare il cancro.), H332 (Nocivo se inalato.), H336 (Può provocare sonnolenza o vertigini.), H319 (Provoca grave irritazione oculare.).

Dove acquistare 4-Methyl-2-pentanone?

4-Methyl-2-pentanone è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/4-methyl-2-pentanone/

Da dove provengono i dati chimici di 4-Methyl-2-pentanone?

I dati chimici di 4-Methyl-2-pentanone provengono da fonti autorevoli: PubChem (NIH), ChEMBL (EBI). PubChem CID: 7909. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

4-Methyl-2-pentanone

Methyl Isobutyl Ketone

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

Informazioni su 4-Methyl-2-pentanone

4-Methyl-2-pentanone è un composto chimico registrato con il numero CAS 108-10-1, con formula bruta C₆H₁₂O, e massa molare di 100.16 g/mol.

La molecola contiene 19 atomi collegati da 18 legami chimici. Il nome sistematico IUPAC completo di questo composto è 4-methylpentan-2-one. Il modello 3D interattivo qui sopra permette di visualizzare la disposizione spaziale degli atomi — puoi ruotarlo con il mouse, zoomare con la rotellina e passare tra le modalità di visualizzazione scheletro / Ball & Stick / Space Fill.

Dal punto di vista delle proprietà chimico-fisiche, il coefficiente di ripartizione logP = 1.3 (valore positivo, composto lipofilo), superficie polare PSA = 17.1 Å², 0 donatori e 1 accettori di legami a idrogeno. Questi parametri sono fondamentali per valutare la biodisponibilità e l'interazione con le biomolecole.

I dati chimici di questo composto provengono da PubChem (NIH NLM NCBI), uno dei più grandi database chimici al mondo. Tutte le informazioni sono aggiornate automaticamente e arricchite con le traduzioni delle indicazioni di pericolo GHS conformi al Regolamento CLP (CE 1272/2008). Il widget qui sopra può essere utilizzato per scopi educativi, di ricerca e commerciali.

Proprietà chimico-fisiche

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 ↗

Sicurezza GHS

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

Letteratura scientifica

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.

Sinonimi

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

Fonti dei dati

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

Acquista nel negozio

4-Methyl-2-pentanone →

Molecole correlate

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