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 Cloruro di idrogeno?

Cloruro di idrogeno è un composto chimico registrato con il numero CAS 7647-01-0. Formula bruta: ClH. Massa molare: 36.46 g/mol.

Qual è il numero CAS di Cloruro di idrogeno?

Il numero CAS di Cloruro di idrogeno è 7647-01-0 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Cloruro di idrogeno?

Formula bruta: ClH. Massa molare: 36.46 g/mol. logP (XLogP3): 0.25.

Quali sono i pericoli GHS di Cloruro di idrogeno?

Secondo la classificazione GHS, Cloruro di idrogeno deve riportare le seguenti indicazioni di pericolo: H314 (Provoca gravi ustioni cutanee e gravi lesioni oculari.), H335 (Può irritare le vie respiratorie.).

Dove acquistare Cloruro di idrogeno?

Cloruro di idrogeno è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/hydrochloric-acid/

Da dove provengono i dati chimici di Cloruro di idrogeno?

I dati chimici di Cloruro di idrogeno provengono da fonti autorevoli: PubChem (NIH). PubChem CID: 313. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Cloruro di idrogeno

Kwas chlorowodorowy

CAS 7647-01-0 · ClH · MW 36.46 g/mol

Informazioni su Cloruro di idrogeno

Cloruro di idrogeno è un composto chimico registrato con il numero CAS 7647-01-0, con formula bruta ClH, e massa molare di 36.46 g/mol.

La molecola contiene 2 atomi collegati da 1 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 = 0.25 (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	ClH
Masa molowa	36.46 g/mol
IUPAC	—
SMILES	`Cl`
InChIKey	—
logP (XLogP3)	0.25
PSA	—
HBD / HBA	—
PubChem CID	CID 313 ↗

Sicurezza GHS

Sygnał: Niebezpieczeństwo

GHS05

GHS07

H314 — Powoduje poważne oparzenia skóry oraz uszkodzenia oczu

H335 — Może powodować podrażnienie dróg oddechowych

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.

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Hydrochloric Acid (CAS No. 7647-01-0)

Nathalia M. C. Tolentino, Luana S. M. Forezi (2014) · Revista Virtual de Química

Open AccessDOI ↗PDF ↗

Hydrogen Chloride 7647-01-0

(2012) · Sax's Dangerous Properties of Industrial Materials

$ PaywallDOI ↗

Hydrochloric Acid 7647-01-0

(2012) · Sax's Dangerous Properties of Industrial Materials

$ PaywallDOI ↗

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Fexuprazan safeguards the esophagus from hydrochloric acid-induced damage by suppressing NLRP1/Caspase-1/GSDMD pyroptotic pathway.

Kim SY, Yoon JH, Jung DH et al. (2024) · Frontiers in immunology

Open AccessDOI ↗PubMed ↗PDF ↗

Hydrochloric Acid 7647‐01‐0

(2012) · Sax's Dangerous Properties of Industrial Materials

$ 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

Hydrochloric acid · Muriatic acid

Fonti dei dati

📊 PubChem CID 313 — NIH
🔬 NIST WebBook — spektroskopia
💊 ChEMBL — bioaktywność

Acquista nel negozio

Hydrochloric acid →

Molecole correlate

Sodium Nitrate CAS 7631-99-4 · NaNO₃ Sodium persulfate CAS 7775-27-1 · Na₂O₈S₂ Propylene glycol monomethyl ether acetate (PMA) CAS 108-65-6 · C6H12O3 Sodium Lauryl Ether Sulfate CAS 68585-34-2 L-Valine CAS 72-18-4 · C5H11NO2 Propylene Glycol CAS 57-55-6 · C3H8O2