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 Acido adipico?

Acido adipico è un composto chimico registrato con il numero CAS 124-04-9. Formula bruta: C6H10O4. Massa molare: 146.14 g/mol. IUPAC: hexanedioic acid.

Qual è il numero CAS di Acido adipico?

Il numero CAS di Acido adipico è 124-04-9 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Acido adipico?

Formula bruta: C6H10O4. Massa molare: 146.14 g/mol. logP (XLogP3): 0.1. PSA: 74.6 Å².

Quali sono i pericoli GHS di Acido adipico?

Secondo la classificazione GHS, Acido adipico deve riportare le seguenti indicazioni di pericolo: H319 (Provoca grave irritazione oculare.).

Dove acquistare Acido adipico?

Acido adipico è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/adipic-acid/

Da dove provengono i dati chimici di Acido adipico?

I dati chimici di Acido adipico provengono da fonti autorevoli: PubChem (NIH), ChEMBL (EBI). PubChem CID: 196. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Acido adipico

CAS 124-04-9 · C₆H₁₀O₄ · MW 146.14 g/mol

Informazioni su Acido adipico

Acido adipico è un composto chimico registrato con il numero CAS 124-04-9, con formula bruta C₆H₁₀O₄, e massa molare di 146.14 g/mol.

La molecola contiene 20 atomi collegati da 19 legami chimici. Il nome sistematico IUPAC completo di questo composto è hexanedioic acid. 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 = 0.1 (valore positivo, composto lipofilo), superficie polare PSA = 74.6 Å², 2 donatori e 4 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	C₆H₁₀O₄
Masa molowa	146.14 g/mol
IUPAC	hexanedioic acid
SMILES	`C(CCC(=O)O)CC(=O)O`
InChIKey	`WNLRTRBMVRJNCN-UHFFFAOYSA-N`
logP (XLogP3)	0.1
PSA	74.6 Å²
HBD / HBA	2 / 4
PubChem CID	CID 196 ↗

Sicurezza GHS

Sygnał: Uwaga

GHS07

H319 — Działa drażniąco na oczy

Letteratura scientifica

Literatura naukowa

20 artykułów · 4 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (20 artykułów)

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

Hexanedioic acid mediated surface-ligand-exchange process for transferring NaYF4:Yb/Er (or Yb/Tm) up-converting nanoparticles from hydrophobic to hydrophilic.

et al. (2009)

Cytowania: 45$ PaywallDOI ↗PubMed ↗

Continuous synthesis of organic-inorganic hybridized cubic nanoassemblies of octahedral cerium oxide nanocrystals and hexanedioic acid.

et al. (2008)

Cytowania: 10$ PaywallDOI ↗PubMed ↗

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First order temperature dependent phase transition in a monoclinic polymorph crystal of 1,6-hexanedioic Acid: an interpretation based on the landau theory approach.

(2014)

Cytowania: 1Open AccessDOI ↗PubMed ↗PDF ↗

In vivo studies on the metabolism of hexanedioic acid.

(1975)

Cytowania: 10$ PaywallDOI ↗PubMed ↗

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Urinary metabolites of cis-9,10-methylene octadecanoic acid. cis-3,4-Methylene hexanedioic acid and related compounds.

(1979)

Cytowania: 3Open AccessDOI ↗PubMed ↗PDF ↗

Solid−Liquid Equilibria for Hexanedioic Acid + Benzoic Acid, Benzoic Acid + Pentanedioic Acid, and Hexanedioic Acid + Pentanedioic Acid

Tzu-Chi Wang, Tzu-Yu Lai, Yan-Ping Chen (2010) · Journal of Chemical & Engineering Data

Cytowania: 17$ PaywallDOI ↗

Formation of n-hexanedioic acid from hexadecanoic acid by an initial ω oxidation in ketotic rats

Jon Elling Pettersen (1972) · Clinica Chimica Acta

Cytowania: 59$ PaywallDOI ↗

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Antimicrobial Constituents from Root

Jung-Eun Kim, Ji-Hye Seo, Min-Suk Bae et al. (2016) · Natural Product Communications

Cytowania: 11Open AccessDOI ↗PDF ↗

Hexanedioic acid

(2007) · Encyclopedic Dictionary of Polymers

$ PaywallDOI ↗

Hexanedioic Acid, Ammonium Salt 19090‐60‐9