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 L-Phenylalanine?

L-Phenylalanine è un composto chimico registrato con il numero CAS 63-91-2. Formula bruta: C9H11NO2. Massa molare: 165.19 g/mol. IUPAC: (2S)-2-amino-3-phenylpropanoic acid.

Qual è il numero CAS di L-Phenylalanine?

Il numero CAS di L-Phenylalanine è 63-91-2 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di L-Phenylalanine?

Formula bruta: C9H11NO2. Massa molare: 165.19 g/mol. logP (XLogP3): -1.5. PSA: 63.3 Å².

Dove acquistare L-Phenylalanine?

L-Phenylalanine è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/l-phenylalanine/

Da dove provengono i dati chimici di L-Phenylalanine?

I dati chimici di L-Phenylalanine provengono da fonti autorevoli: PubChem (NIH), ChEMBL (EBI). PubChem CID: 6140. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

L-Phenylalanine

CAS 63-91-2 · C₉H₁₁NO₂ · MW 165.19 g/mol

Informazioni su L-Phenylalanine

L-Phenylalanine è un composto chimico registrato con il numero CAS 63-91-2, con formula bruta C₉H₁₁NO₂, e massa molare di 165.19 g/mol.

La molecola contiene 23 atomi collegati da 23 legami chimici. Il nome sistematico IUPAC completo di questo composto è (2S)-2-amino-3-phenylpropanoic 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 = -1.5 (valore negativo, composto idrofilo), superficie polare PSA = 63.3 Å², 2 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	C₉H₁₁NO₂
Masa molowa	165.19 g/mol
IUPAC	(2S)-2-amino-3-phenylpropanoic acid
SMILES	`C1=CC=C(C=C1)C[C@@H](C(=O)O)N`
InChIKey	`COLNVLDHVKWLRT-QMMMGPOBSA-N`
logP (XLogP3)	-1.5
PSA	63.3 Å²
HBD / HBA	2 / 3
PubChem CID	CID 6140 ↗

Letteratura scientifica

Literatura naukowa

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

📈 Timeline publikacji (3 artykułów)

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

🔓

Heat Capacities of l-Histidine, l-Phenylalanine, l-Proline, l-Tryptophan and l-Tyrosine

Václav Pokorný, Vojtěch Štejfa, Jakub Havlín et al. (2021) · Molecules

Open AccessDOI ↗PDF ↗

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N-Lactoyl Phenylalanine Disrupts Insulin Signaling, Induces Inflammation, and Impairs Mitochondrial Respiration in Cell Models.

Hedaya L, Naja K, Almuraikhy S et al. (2025) · Cells

Open AccessDOI ↗PubMed ↗PDF ↗

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SLC6A19 inhibition facilitates urinary neutral amino acid excretion and lowers plasma phenylalanine.

Wobst HJ, Viader A, Muncipinto G et al. (2024) · JCI insight

Open AccessDOI ↗PubMed ↗PDF ↗

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

Sinonimi

L-phenylalanine · phenylalanine · 63-91-2 · (S)-2-Amino-3-phenylpropanoic acid · (2S)-2-amino-3-phenylpropanoic acid · 3-Phenyl-L-alanine · (S)-Phenylalanine · (L)-Phenylalanine · 3-Phenylalanine · beta-Phenyl-L-alanine · (S)-2-Amino-3-phenylpropionic acid · Antibiotic FN 1636 · L-Alanine, phenyl- · Alanine, 3-phenyl- · fenilalanina

Fonti dei dati

📊 PubChem CID 6140 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Acquista nel negozio

L-Phenylalanine →

Molecole correlate

Ethylene Carbonate CAS 96-49-1 · C3H4O3 Sodium Glutamate CAS 142-47-2 · C5H10NNaO5 Diethylene glycol dimethyl ether CAS 110-71-4 · C4H10O2 Acetic acid CAS 64-19-7 · C₂H₄O₂ Phthalic anhydride (MA) CAS 85-44-9 · C8H4O3 L-Tryptophan CAS 73-22-3 · C11H12N2O2