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 Methylene Chloride?

Methylene Chloride è un composto chimico registrato con il numero CAS 75-09-2. Formula bruta: CH₂Cl₂. Massa molare: 84.93 g/mol.

Qual è il numero CAS di Methylene Chloride?

Il numero CAS di Methylene Chloride è 75-09-2 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Methylene Chloride?

Formula bruta: CH₂Cl₂. Massa molare: 84.93 g/mol. logP (XLogP3): 1.25.

Quali sono i pericoli GHS di Methylene Chloride?

Secondo la classificazione GHS, Methylene Chloride deve riportare le seguenti indicazioni di pericolo: H351 (Sospettato di provocare il cancro.).

Dove acquistare Methylene Chloride?

Methylene Chloride è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/methylene-chloride/

Da dove provengono i dati chimici di Methylene Chloride?

I dati chimici di Methylene Chloride provengono da fonti autorevoli: PubChem (NIH). PubChem CID: 6344. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Methylene Chloride

Dichlorometan

CAS 75-09-2 · CH₂Cl₂ · MW 84.93 g/mol

Informazioni su Methylene Chloride

Methylene Chloride è un composto chimico registrato con il numero CAS 75-09-2, con formula bruta CH₂Cl₂, e massa molare di 84.93 g/mol.

La molecola contiene 5 atomi collegati da 4 legami chimici. 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 = 1.25 (valore positivo, composto lipofilo). 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	CH₂Cl₂
Masa molowa	84.93 g/mol
IUPAC	—
SMILES	`ClCCl`
InChIKey	—
logP (XLogP3)	1.25
PSA	—
HBD / HBA	—
PubChem CID	CID 6344 ↗

Sicurezza GHS

Sygnał: Uwaga

GHS08

H351 — Podejrzewa się, że powoduje raka

Letteratura scientifica

Literatura naukowa

5 artykułów · 2 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (5 artykułów)

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

NTP Toxicology and Carcinogenesis Studies of Dichloromethane (Methylene Chloride) (CAS No. 75-09-2) in F344/N Rats and B6C3F1 Mice (Inhalation Studies).

(1986) · National Toxicology Program technical report series

AI Summary
Dichloromethane is widely used in industrial processes, food preparation, and agriculture and has been used as an inhalation anesthetic and as a fumigant for grain and strawberries.

Cytowania: 27Influential: 1$ PaywallPubMed ↗

🔓

Studies on the nitration of toluene with a nitric acid(V)/dichloromethane mixture

Andrzej Nastała, Paweł Maksimowski, Waldemar Tomaszewski (2018) · Materiały Wysokoenergetyczne / High Energy Materials

Open AccessDOI ↗PDF ↗

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Aquilariae Lignum Methylene Chloride Fraction Attenuates IL-1β-Driven Neuroinflammation in BV2 Microglial Cells.

Lee JS, Jeon YJ, Kang JY et al. (2020) · International journal of molecular sciences

Open AccessDOI ↗PubMed ↗PDF ↗

Methylene Chloride.

Phillips JA (2018) · Workplace health & safety

$ PaywallDOI ↗PubMed ↗

Methylene Chloride Comment.

Goodwin J, Holm F (2023) · New solutions : a journal of environmental and occupational health policy : NS

$ PaywallDOI ↗PubMed ↗

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

Sinonimi

Methylene chloride · DCM

Fonti dei dati

📊 PubChem CID 6344 — NIH
🔬 NIST WebBook — spektroskopia
💊 ChEMBL — bioaktywność

Acquista nel negozio

Methylene Chloride →

Molecole correlate

Polypropylene Glycol CAS 25322-69-4 Hydrochloric acid CAS 7647-01-0 · ClH Acetone CAS 67-64-1 · C3H6O Methyl Propanediol CAS 2163-42-0 · C4H10O2 Melamine CAS 108-78-1 · C3H6N6 Polyvinyl Alcohol (PVA) CAS 9002-89-5