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 N-methyl-2-pyrrolidone?

N-methyl-2-pyrrolidone è un composto chimico registrato con il numero CAS 872-50-4. Formula bruta: C5H9NO. Massa molare: 99.13 g/mol. IUPAC: 1-methylpyrrolidin-2-one.

Qual è il numero CAS di N-methyl-2-pyrrolidone?

Il numero CAS di N-methyl-2-pyrrolidone è 872-50-4 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di N-methyl-2-pyrrolidone?

Formula bruta: C5H9NO. Massa molare: 99.13 g/mol. logP (XLogP3): -0.5. PSA: 20.3 Å².

Quali sono i pericoli GHS di N-methyl-2-pyrrolidone?

Secondo la classificazione GHS, N-methyl-2-pyrrolidone deve riportare le seguenti indicazioni di pericolo: H360D (Può nuocere al feto.), H335 (Può irritare le vie respiratorie.), H315 (Provoca irritazione cutanea.), H319 (Provoca grave irritazione oculare.).

Dove acquistare N-methyl-2-pyrrolidone?

N-methyl-2-pyrrolidone è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/n-methyl-2-pyrrolidone/

Da dove provengono i dati chimici di N-methyl-2-pyrrolidone?

I dati chimici di N-methyl-2-pyrrolidone provengono da fonti autorevoli: PubChem (NIH), ChEMBL (EBI). PubChem CID: 13387. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

N-methyl-2-pyrrolidone

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

Informazioni su N-methyl-2-pyrrolidone

N-methyl-2-pyrrolidone è un composto chimico registrato con il numero CAS 872-50-4, con formula bruta C₅H₉NO, e massa molare di 99.13 g/mol.

La molecola contiene 16 atomi collegati da 16 legami chimici. Il nome sistematico IUPAC completo di questo composto è 1-methylpyrrolidin-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 = -0.5 (valore negativo, composto idrofilo), superficie polare PSA = 20.3 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	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 ↗

Sicurezza GHS

Sygnał: Niebezpieczeństwo

GHS07

GHS08

? — H360D

H335 — Może powodować podrażnienie dróg oddechowych

H315 — Działa drażniąco na skórę

H319 — Działa drażniąco na oczy

Letteratura scientifica

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.

Sinonimi

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

Fonti dei dati

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

Acquista nel negozio

N-Methyl-2-pyrrolidone →

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