High purity, low color.
Purity ≥99.5% with molten color ≤20 APHA, suited to light-colored plasticizers and resins.
Phthalic anhydride (PA, КАС 85-44-9) is one of the most widely used organic intermediates. It is the starting material for phthalate plasticizers such as DBP, DIBP and DOP, and a core acid component of unsaturated polyester and alkyd resins. SUNCHEM supplies PA with purity ≥99.5% and a COA for every batch.
Phthalic anhydride is the cyclic anhydride of phthalic acid. The anhydride ring opens readily with alcohols, which is why PA is the standard route to phthalate esters and to the polyester backbone of many resins.
Most PA goes into plasticizers for PVC, such as dibutyl phthalate (DBP), diisobutyl phthalate (DIBP) and dioctyl phthalate (ДОП). The second large outlet is resins: in unsaturated polyester resin (УПО) PA is the saturated acid used alongside maleic anhydride, and in alkyd resins for paints and coatings it supplies the aromatic acid component.
PA is also an intermediate for dyes and pigments, the laxative phenolphthalein, saccharin sodium, and agrochemicals including the insecticide phosmet, the fungicide folpet and the herbicide bentazone. A high-purity grade is used as an analytical reagent.
For resin and plasticizer makers, чистота, цвет (molten, heat-stability and sulfuric-acid color) and free phthalic acid are the numbers that decide product color and reactivity.
Purity ≥99.5% with molten color ≤20 APHA, suited to light-colored plasticizers and resins.
Чистота, three color tests, crystallization point and free acid are reported for each lot.
Phthalic anhydride and maleic anhydride can be quoted together for UPR and alkyd production.
| Параметр | Спецификация | Typical batch result |
|---|---|---|
| Название продукта | Phthalic Anhydride (PA) | — |
| Номер КАС. | 85-44-9 | — |
| ЕС нет. | 201-607-5 | — |
| Молекулярная формула | C₈H₄O₃ | — |
| Молекулярный вес | 148.12 | — |
| вид | White flake or crystalline powder | White flake or crystalline powder |
| Чистота, % | ≥ 99.5 | 99.96 |
| Molten color, АФА | ≤ 20 | 20 |
| Heat-stability color, АФА | ≤ 50 | 40 |
| Sulfuric-acid color, АФА | ≤ 40 | 10 |
| Crystallization point, °С | ≥ 130.5 | 131.2 |
| Free acid (as phthalic acid), % | ≤ 0.20 | 0.06 |
Typical batch result is from one production lot (batch 20260709) and is shown for reference only. Each shipment is supplied with the COA of the batch you receive.
Where phthalic anhydride is used, и что необходимо подтвердить перед переключением источника питания.
The largest use. PA is esterified with alcohols to make DBP, DIBP, DOP and other phthalate plasticizers for flexible PVC.
Used with maleic anhydride and glycols in ortho-phthalic UPR for FRP, gelcoats, artificial stone and putties. PA is the saturated acid that balances stiffness and cost.
Supplies the aromatic acid component of alkyd resins for paints, enamels and other coatings.
An intermediate for dyes and pigments, phenolphthalein, saccharin sodium, and agrochemicals such as phosmet, folpet and bentazone. A high-purity grade is used as an analytical reagent.
| Ваше требование | Что обычно работает |
|---|---|
| General plasticizer and resin production | Industrial PA, purity ≥ 99.5% |
| Light-colored plasticizers, gelcoats and clear resins | Specify molten, heat-stability and sulfuric-acid color limits |
| Ortho-phthalic UPR | PA together with maleic anhydride — both can be quoted on one order |
| Замена существующего поставщика | Отправьте текущий TDS или COA; мы цитируем параметры, которые вы утверждаете |
Проведите пальцем по экрану или прокрутите по горизонтали, чтобы увидеть все столбцы →
| Phthalic Anhydride (PA) | Малеиновый ангидрид (Массачусетс) | |
|---|---|---|
| Номер КАС. | 85-44-9 | 108-31-6 |
| Structure | Aromatic anhydride, no C=C double bond | Unsaturated anhydride with a C=C double bond |
| Role in UPR | Saturated acid — stiffness, cost balance | Unsaturated acid — sites for styrene crosslinking |
| Other main uses | Phthalate plasticizers, alkyd resins, красители | Alkyds, малеиновая канифоль, SMA copolymers, malathion |
In ortho-phthalic UPR the two are used together; the PA / MA ratio sets the balance between cost and cured hardness. Confirm your recipe by trial.
Packaging is confirmed in the quotation. Tell us your bag size and pallet requirements with your inquiry.
Храните сумки закрытыми в прохладном месте., сухой, вентилируемое хранилище вдали от источников тепла. Moisture slowly converts PA to phthalic acid. The dust can sensitize skin and airways and damage eyes — follow the SDS.
Regulated for transport as a corrosive (И 2214, Сорт 8, PG III). Мы цитируем FOB и CIF; для больших объемов, время выполнения подтверждено в предложении.
Plasticizer, УПО, alkyd or an intermediate: tell us which one, because color and free-acid limits differ.
Чистота, molten color, heat-stability color, sulfuric-acid color, crystallization point and free acid. Запросите в нашем сертификате подлинности те же параметры, которые указаны в листе входного контроля..
The specification sets the limits. Сертификат подлинности сообщает результаты только для одной партии.. Попросите сертификат подлинности партии, которую вы получите..
Запустите образец в своем собственном процессе и сохраните утвержденный сертификат подлинности партии в качестве образца для ограничений по контракту..
Tell us the product you make, количество и порт назначения. Добавьте свою текущую спецификацию, и мы сделаем предложение по ней.
| Информация | Пример |
|---|---|
| Приложение | Plasticizer (DBP, ДОП), УПО, алкидный, dye or intermediate |
| Требуемая спецификация | Чистота, пределы цвета, свободная кислота |
| Форма & упаковка | Flakes; bag size and pallet requirements |
| Количество | Пробный заказ / ежемесячно / годовой объем |
| Место назначения | Страна и порт |
| Необходимые документы | сертификат подлинности, паспорт безопасности, ТДС, другие документы, необходимые вашей команде качества |
Brominated derivative of phthalic anhydride for flame-retardant resins.
Посмотреть товар →High-purity phthalic acid for electronic applications.
Посмотреть товар →Mainly for phthalate plasticizers such as DBP, DIBP and DOP used in PVC. It is also a core raw material for unsaturated polyester and alkyd resins, краски и покрытия, and an intermediate for dyes and pigments, phenolphthalein, saccharin sodium and agrochemicals such as phosmet, folpet and bentazone.
Номер CAS 85-44-9. The molecular formula is C₈H₄O₃ and the molecular weight is 148.12.
Purity ≥ 99.5%, with molten color ≤ 20 APHA and free acid ≤ 0.20%. A recent batch tested 99.96% чистота. Every shipment comes with the COA of that batch.
In closed bags in a cool, сухой, ventilated store. Moisture slowly converts it to phthalic acid, and the dust can sensitize skin and airways, so follow the SDS for handling.
Да. It is regulated as a corrosive for transport under UN 2214, Сорт 8, PG III.
Да. Бесплатные образцы доступны для покупателей, оценивающих продукт для производственного использования.. Стоимость доставки согласовывается индивидуально, и каждый образец поставляется с сертификатом подлинности.