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 Diethylene glycol monobutyl ether?

Diethylene glycol monobutyl ether è un composto chimico registrato con il numero CAS 112-34-5. Formula bruta: C8H18O3. Massa molare: 162.23 g/mol. IUPAC: 2-(2-butoxyethoxy)ethanol.

Qual è il numero CAS di Diethylene glycol monobutyl ether?

Il numero CAS di Diethylene glycol monobutyl ether è 112-34-5 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Diethylene glycol monobutyl ether?

Formula bruta: C8H18O3. Massa molare: 162.23 g/mol. logP (XLogP3): 0.6. PSA: 38.7 Å².

Quali sono i pericoli GHS di Diethylene glycol monobutyl ether?

Secondo la classificazione GHS, Diethylene glycol monobutyl ether deve riportare le seguenti indicazioni di pericolo: H319 (Provoca grave irritazione oculare.).

Dove acquistare Diethylene glycol monobutyl ether?

Diethylene glycol monobutyl ether è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/diethylene-glycol-monobutyl-ether/

Da dove provengono i dati chimici di Diethylene glycol monobutyl ether?

I dati chimici di Diethylene glycol monobutyl ether provengono da fonti autorevoli: PubChem (NIH), ChEMBL (EBI). PubChem CID: 8177. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Diethylene glycol monobutyl ether

CAS 112-34-5 · C₈H₁₈O₃ · MW 162.23 g/mol

Informazioni su Diethylene glycol monobutyl ether

Diethylene glycol monobutyl ether è un composto chimico registrato con il numero CAS 112-34-5, con formula bruta C₈H₁₈O₃, e massa molare di 162.23 g/mol.

La molecola contiene 29 atomi collegati da 28 legami chimici. Il nome sistematico IUPAC completo di questo composto è 2-(2-butoxyethoxy)ethanol. 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 = 0.6 (valore positivo, composto lipofilo), superficie polare PSA = 38.7 Å², 1 donatori e 3 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	C₈H₁₈O₃
Masa molowa	162.23 g/mol
IUPAC	2-(2-butoxyethoxy)ethanol
SMILES	`CCCCOCCOCCO`
InChIKey	`OAYXUHPQHDHDDZ-UHFFFAOYSA-N`
logP (XLogP3)	0.6
PSA	38.7 Å²
HBD / HBA	1 / 3
PubChem CID	CID 8177 ↗

Sicurezza GHS

Sygnał: Uwaga

GHS07

H319 — Działa drażniąco na oczy

Letteratura scientifica

Literatura naukowa

19 artykułów · 3 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (19 artykułów)

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

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Indoor Air Guideline Levels for 2-ethoxyethanol, 2-(2-ethoxyethoxy)ethanol, 2-(2-butoxyethoxy)ethanol and 1-methoxy-2-propanol

Gunnar Damgård Nielsen, Lea Frimann Hansen, Bjørn Andersen Nexø et al. (1998) · Indoor Air

Cytowania: 8Open AccessDOI ↗PDF ↗

Hypersensitivity to 2-(2-butoxyethoxy)ethanol.

Berlin K, Johanson G, Lindberg M (1995) · Contact dermatitis

Cytowania: 17$ PaywallDOI ↗PubMed ↗

Dermal exposure during filling, loading and brushing with products containing 2-(2-butoxyethoxy)ethanol.

et al. (2004)

Cytowania: 6$ PaywallDOI ↗PubMed ↗

Viscosity of the binary liquid mixture of 2-(2-hydroxyethylamino)ethanol and 2-(2-butoxyethoxy)ethanol

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

$ PaywallDOI ↗

Refractive index of 2-(2-butoxyethoxy)ethanol

Christian Wohlfarth (2017) · Optical Constants

$ PaywallDOI ↗

Viscosity of 2-(2-butoxyethoxy)ethanol

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

$ PaywallDOI ↗

Viscosity of 2-(2-butoxyethoxy)ethanol