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.

什么是Sodium Tripolyphosphate？

Sodium Tripolyphosphate 是一种化学品，CAS 登记号为 7758-29-4。分子式: Na₅O₁₀P₃. 摩尔质量: 367.86 g/mol. IUPAC: pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate.

Sodium Tripolyphosphate 的 CAS 号是多少？

Sodium Tripolyphosphate 的 CAS 号为 7758-29-4——化学文摘社 (CAS) 的唯一标识符。

Sodium Tripolyphosphate 的分子式是什么？

分子式: Na₅O₁₀P₃. 摩尔质量: 367.86 g/mol. PSA: 185 Å².

在哪里可以购买Sodium Tripolyphosphate？

Sodium Tripolyphosphate 在我们的商店有售。查看产品：https://epchems.online/products/sodium-tripolyphosphate/

Sodium Tripolyphosphate 的化学数据来自哪里？

Sodium Tripolyphosphate 的化学数据来自权威来源：PubChem (NIH)。 PubChem CID: 24455. 符合 CLP 法规（EC 1272/2008），依据 CC-BY 4.0 许可提供。

Sodium Tripolyphosphate

CAS 7758-29-4 · Na₅O₁₀P₃ · MW 367.86 g/mol

关于 Sodium Tripolyphosphate

Sodium Tripolyphosphate 是一种化学品，登记号为 CAS 7758-29-4，分子式为 Na₅O₁₀P₃，摩尔质量为 367.86 g/mol。

该分子包含 18 个原子，通过 12 个化学键连接。该化合物的完整系统 IUPAC 名称为 pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate。上方的交互式 3D 模型可查看原子的空间排列——您可以用鼠标旋转、用滚轮缩放，并在骨架 / 球棍 (Ball & Stick) / 空间填充 (Space Fill) 显示模式之间切换。

在理化性质方面，极性表面积 PSA = 185 Å²，0 个氢键供体和 10 个氢键受体。这些参数对于评估生物利用度以及与生物分子的相互作用至关重要。

该化合物的化学数据来自 PubChem（NIH NLM NCBI），全球最大的化学数据库之一。所有信息均自动更新，并附有符合 CLP 法规（EC 1272/2008）的 GHS 危险说明翻译。上方的小部件可用于教育、研究和商业用途。

理化性质

Wzór sumaryczny	Na₅O₁₀P₃
Masa molowa	367.86 g/mol
IUPAC	pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate
SMILES	`[O-]P(=O)([O-])OP(=O)([O-])OP(=O)([O-])[O-].[Na+].[Na+].[Na+].[Na+].[Na+]`
InChIKey	`HWGNBUXHKFFFIH-UHFFFAOYSA-I`
logP (XLogP3)	—
PSA	185 Å²
HBD / HBA	0 / 10
PubChem CID	CID 24455 ↗

GHS 安全

Sygnał: Uwaga

GHS07

科学文献

Literatura naukowa

3 artykułów · 0 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial useSeparation by column chromatography and determination of the different phosphate forms

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Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use

$ PaywallDOI ↗

Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use

$ PaywallDOI ↗

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

同义词

7758-29-4 · Pentasodium triphosphate · STPP · Armofos · Thermphos · Rhodiaphos LV · Thermphos N · Triphosphoric acid, pentasodium salt · Thermphos SPR · Thermphos L 50 · Sodium phosphate (Na5P3O10) · Sodium triphosphate (Na5P3O10) · 9SW4PFD2FZ · S 400 · RefChem:171474

数据来源

📊 PubChem CID 24455 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

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