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.

Qu'est-ce que N-methyl-2-pyrrolidone ?

N-methyl-2-pyrrolidone est un composé chimique enregistré sous le numéro CAS 872-50-4. Formule brute: C5H9NO. Masse molaire: 99.13 g/mol. IUPAC: 1-methylpyrrolidin-2-one.

Quel est le numéro CAS de N-methyl-2-pyrrolidone ?

Le numéro CAS de N-methyl-2-pyrrolidone est 872-50-4 — un identifiant unique du Chemical Abstracts Service (CAS).

Quelle est la formule brute de N-methyl-2-pyrrolidone ?

Formule brute: C5H9NO. Masse molaire: 99.13 g/mol. logP (XLogP3): -0.5. PSA: 20.3 Å².

Quels sont les dangers GHS de N-methyl-2-pyrrolidone ?

Selon la classification GHS, N-methyl-2-pyrrolidone doit porter les mentions de danger suivantes : H360D (Peut nuire au fœtus.), H335 (Peut irriter les voies respiratoires.), H315 (Provoque une irritation cutanée.), H319 (Provoque une sévère irritation des yeux.).

Où acheter N-methyl-2-pyrrolidone ?

N-methyl-2-pyrrolidone est disponible dans notre boutique. Voir le produit : https://epchems.online/products/n-methyl-2-pyrrolidone/

D'où proviennent les données chimiques de N-methyl-2-pyrrolidone ?

Les données chimiques de N-methyl-2-pyrrolidone proviennent de sources faisant autorité : PubChem (NIH), ChEMBL (EBI). PubChem CID: 13387. Conformes au règlement CLP (CE 1272/2008), disponibles sous licence CC-BY 4.0.

N-methyl-2-pyrrolidone

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

À propos de N-methyl-2-pyrrolidone

N-methyl-2-pyrrolidone est un composé chimique enregistré sous le numéro CAS 872-50-4, de formule brute C₅H₉NO, et de masse molaire 99.13 g/mol.

La molécule contient 16 atomes reliés par 16 liaisons chimiques. Le nom systématique IUPAC complet de ce composé est 1-methylpyrrolidin-2-one. Le modèle 3D interactif ci-dessus permet de visualiser l'arrangement spatial des atomes — vous pouvez le faire pivoter à la souris, zoomer avec la molette et basculer entre les modes de visualisation squelette / Ball & Stick / Space Fill.

Du point de vue des propriétés physico-chimiques, le coefficient de partage logP = -0.5 (valeur négative, composé hydrophile), surface polaire PSA = 20.3 Å², 0 donneurs et 1 accepteurs de liaisons hydrogène. Ces paramètres sont essentiels pour évaluer la biodisponibilité et l'interaction avec les biomolécules.

Les données chimiques de ce composé proviennent de PubChem (NIH NLM NCBI), l'une des plus grandes bases de données chimiques au monde. Toutes les informations sont mises à jour automatiquement et enrichies de traductions des mentions de danger GHS conformes au règlement CLP (CE 1272/2008). Le widget ci-dessus peut être utilisé à des fins éducatives, de recherche et commerciales.

Propriétés physico-chimiques

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 ↗

Sécurité GHS

Sygnał: Niebezpieczeństwo

GHS07

GHS08

? — H360D

H335 — Może powodować podrażnienie dróg oddechowych

H315 — Działa drażniąco na skórę

H319 — Działa drażniąco na oczy

Littérature scientifique

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.

Synonymes

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

Sources des données

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

Acheter en boutique

N-Methyl-2-pyrrolidone →

Molécules apparentées

L-Cystine CAS 30925-07-6 · C6H14Cl2N2O4S2 Methylene Chloride CAS 75-09-2 · CH₂Cl₂ Propylene Glycol CAS 57-55-6 · C3H8O2 Butyl acetate (BTAC) CAS 123-86-4 · C6H12O2 Tetrahydrofuran CAS 109-99-9 · C4H8O Sodium carbonate CAS 497-19-8 · CNa₂O₃