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 N-methyl-2-pyrrolidone?

N-methyl-2-pyrrolidone ist eine chemische Verbindung, registriert unter der CAS-Nummer 872-50-4. Summenformel: C5H9NO. Molmasse: 99.13 g/mol. IUPAC: 1-methylpyrrolidin-2-one.

Wie lautet die CAS-Nummer von N-methyl-2-pyrrolidone?

Die CAS-Nummer von N-methyl-2-pyrrolidone ist 872-50-4 — eine eindeutige Kennung des Chemical Abstracts Service (CAS).

Wie lautet die Summenformel von N-methyl-2-pyrrolidone?

Summenformel: C5H9NO. Molmasse: 99.13 g/mol. logP (XLogP3): -0.5. PSA: 20.3 Å².

Welche GHS-Gefahren hat N-methyl-2-pyrrolidone?

Gemäß der GHS-Klassifizierung muss N-methyl-2-pyrrolidone mit den folgenden Gefahrenhinweisen gekennzeichnet werden: H360D (Kann das Kind im Mutterleib schädigen.), H335 (Kann die Atemwege reizen.), H315 (Verursacht Hautreizungen.), H319 (Verursacht schwere Augenreizung.).

Wo kann ich N-methyl-2-pyrrolidone kaufen?

N-methyl-2-pyrrolidone ist in unserem Shop erhältlich. Produkt ansehen: https://epchems.online/products/n-methyl-2-pyrrolidone/

Woher stammen die chemischen Daten für N-methyl-2-pyrrolidone?

Die chemischen Daten für N-methyl-2-pyrrolidone stammen aus zuverlässigen Quellen: PubChem (NIH), ChEMBL (EBI). PubChem CID: 13387. Konform mit der CLP-Verordnung (EG 1272/2008), verfügbar unter der Lizenz CC-BY 4.0.

N-methyl-2-pyrrolidone

CAS 872-50-4 · C₅H₉NO · MW 99.13 g/mol

Über N-methyl-2-pyrrolidone

N-methyl-2-pyrrolidone ist eine chemische Verbindung, registriert unter der Nummer CAS 872-50-4, mit der Summenformel C₅H₉NO, und einer Molmasse von 99.13 g/mol.

Das Molekül enthält 16 Atome, verbunden durch 16 chemische Bindungen. Der vollständige systematische IUPAC-Name dieser Verbindung lautet 1-methylpyrrolidin-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 = -0.5 (negativer Wert, hydrophile Verbindung), polare Oberfläche PSA = 20.3 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	C₅H₉NO
Masa molowa	99.13 g/mol
IUPAC	1-methylpyrrolidin-2-one
SMILES	`CN1CCCC1=O`
InChIKey	`SECXISVLQFMRJM-UHFFFAOYSA-N`
logP (XLogP3)	-0.5
PSA	20.3 Å²
HBD / HBA	0 / 1
PubChem CID	CID 13387 ↗

GHS-Sicherheit

Sygnał: Niebezpieczeństwo

GHS07

GHS08

? — H360D

H335 — Może powodować podrażnienie dróg oddechowych

H315 — Działa drażniąco na skórę

H319 — Działa drażniąco na oczy

Wissenschaftliche Literatur

Literatura naukowa

20 artykułów · 10 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (20 artykułów)

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

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2,3-Diphenylmaleimide 1-methylpyrrolidin-2-one monosolvate

Evgeny Bulatov, Dina Boyarskaya, Tatiana Chulkova et al. (2014) · Acta Crystallographica Section E

Open AccessDOI ↗PDF ↗

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Naphthalene-2,6-dicarboxylic acid–1-methylpyrrolidin-2-one (1/2)

Xi Li, Youwei Cheng, Ge Peng et al. (2011) · Acta Crystallographica Section E

Open AccessDOI ↗PDF ↗

NMR spectroscopy and theoretical calculations in the conformational analysis of 1-methylpyrrolidin-2-one 3-halo-derivatives.

et al. (2015)

Cytowania: 1$ PaywallDOI ↗PubMed ↗

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Two New Lactam Derivatives from Micromelum falcatum (Lour.) Tan. with Brine Shrimp Larvae Toxicity.

Liu B, Jin X, Chen X et al. (2023) · Molecules (Basel, Switzerland)

Cytowania: 3Open AccessDOI ↗PubMed ↗PDF ↗

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Crystal structure of poly[bis(ammonium) [bis(μ4-benzene-1,3,5-tricarboxylato)dizincate] 1-methylpyrrolidin-2-one disolvate]

Carlos Ordonez, Marina S. Fonari, Qiang Wei et al. (2016) · Acta Crystallographica Section E: Crystallographic Communications

Open AccessDOI ↗PDF ↗

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6-{5-Amino-3-tert-butyl-4-[(E)-(3-methyl-1,2,4-thiadiazol-5-yl)diazen-yl]-1H-pyrazol-1-yl}-1,3,5-triazine-2,4(1H,3H)-dione-1-methyl-pyrrolidin-2-one-water (1/1/1).

Shibata H, Mizuguchi J (2010) · Acta crystallographica. Section E, Structure reports online

Open AccessDOI ↗PubMed ↗PDF ↗

N-TERMINAL BROMODOMAIN OF HUMAN BRD2 WITH 1-METHYLPYRROLIDIN-2-ONE

C.W. Chung, P. Bamborough (2012)

$ PaywallDOI ↗

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Bioactivities of a New Pyrrolidine Alkaloid from the Root Barks of Orixa japonica

Xin Chao Liu, Daowan Lai, Qi Zhi Liu et al. (2016) · Molecules

Open AccessDOI ↗PDF ↗

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3-(1-Methylpyrrolidin-2-ylidene)-3H-indole sesquihydrate

John A. Joule, Mehdi M. Baradarani, Masomeh Aghazadeh et al. (2009) · Acta Crystallographica Section E

Open AccessDOI ↗PDF ↗

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5-Hydroxy-1-methyl-3,4-dihydro-2H-pyrrolium hydrogensulfate

Yan-Xiong Fang, Hua-Rong Huang, Zhi-Yun Du et al. (2008) · Acta Crystallographica Section E

Open AccessDOI ↗PDF ↗

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Synthesis of 3-benzylidene-1-methylpyrrolidin-2-one through 3-chloromethylene-1-methylpyrrolidin-2-one.

Julio Seijas, M. Vazquez-Tato, Luis Barreiro-Castro et al. (1999) · Proceedings of The 3rd International Electronic Conference on Synthetic Organic Chemistry

Open AccessDOI ↗PDF ↗

Using 1-Methylpyrrolidin-2-one

L. R. Subramanian (2004) · Three Carbon-Heteroatom Bonds: Nitriles, Isocyanides, and Derivatives

$ PaywallDOI ↗

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N-methyl pyrrolidone (NMP) ameliorates the hypoxia-reduced osteoblast differentiation via inhibiting the NF-κB signaling.

Li Q, Liu R, Zhao J et al. (2016) · The Journal of toxicological sciences

Open AccessDOI ↗PubMed ↗PDF ↗

Workplace environmental exposure level guide: n-Methyl-2-pyrrolidone.

(2022) · Toxicology and industrial health

$ PaywallDOI ↗PubMed ↗

An insight into the skin penetration enhancement mechanism of N-methylpyrrolidone.

Cilurzo F, Vistoli G, Selmin F et al. (2014) · Molecular pharmaceutics

$ PaywallDOI ↗PubMed ↗

Crystal structure of BRD4 bromodomain 1 with N-methylpyrrolidin-2-one (NMP) derivative 5 (1-methyl-4-phenylpyrrolidin-2-one)

O.V. Ilyichova, M.J. Scanlon, P.E. Thompson (2020)

$ PaywallDOI ↗

Viscosity of N-methylpyrrolidin-2-one

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

$ PaywallDOI ↗

Viscosity of N-methylpyrrolidin-2-one

Ch. Wohlfarth (2008) · Landolt-Börnstein - Group IV Physical Chemistry

$ PaywallDOI ↗

Refractive index of N-methylpyrrolidin-2-one

Christian Wohlfarth (2017) · Optical Constants

$ PaywallDOI ↗

Crystal structure of BRD4 bromodomain 1 with N-methylpyrrolidin-2-one (NMP) derivative 7b (1-methyl-4-(4-(piperidin-1-ylsulfonyl)phenyl)pyrrolidin-2-one)

O.V. Ilyichova, M.J. Scanlon, P.E. Thompson (2020)

$ 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

1-METHYL-2-PYRROLIDINONE · 872-50-4 · N-Methyl-2-pyrrolidone · N-Methylpyrrolidone · N-Methyl-2-pyrrolidinone · Methylpyrrolidone · 1-Methyl-2-pyrrolidone · 1-Methylpyrrolidone · Methyl pyrrolidone · N-Methylpyrrolidinone · 1-Methylpyrrolidinone · n-methyl-pyrrolidone · 1-Methyl-5-pyrrolidinone · 2-Pyrrolidinone, 1-methyl- · 1-Methylazacyclopentan-2-one

Datenquellen

📊 PubChem CID 13387 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

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