Phthalic anhydride
Phthalic anhydride (CAS 85-44-9), with the molecular formula C8H4O3 and a molecular weight of 148.12 g/mol, is a white crystalline solid. It is a key intermediate in the synthesis of various organic compounds. Its primary applications include the production of plasticizers, polyester resins, alkyd resins for paints and coatings, and dyes. This compound is essential for numerous industrial chemical processes.
Plasticizer Production
Phthalic anhydride is a crucial precursor for manufacturing phthalate plasticizers, widely used to enhance the flexibility and durability of PVC and other polymers in applications such as cables, flooring, and films.
Polyester and Alkyd Resins
It serves as a vital component in the synthesis of unsaturated polyester resins and alkyd resins. These resins are extensively employed in the formulation of coatings, adhesives, and composite materials.
Dye Synthesis
The compound is used in the production of various dyes, including phenolphthalein and fluorescein. These dyes find applications in textiles, inks, and as pH indicators.
Chemical Synthesis Intermediate
Phthalic anhydride acts as a versatile building block in organic synthesis, enabling the creation of more complex molecules for pharmaceuticals, agrochemicals, and other fine chemical industries.
| Molecular weight | 148.12 |
|---|---|
| Empirical formula | C8H4O3 |
| Assay | 99% |
| Boiling point | 284 °C(lit.) |
| Vapour pressure | <0.01 mmHg (20 °C) |
| Vapour density | 5.1 (vs air) |
| Autoignition temp | 1058 °F |
| Melting point | 131-134 °C(lit.) |
Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H318Causes serious eye damage
- H334May cause allergy or asthma symptoms if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P342
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | 152 °C / 305.6 °F |
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-37/38-41-42/43 |
| Safety statements (S) | 23-24/25-26-37/39-46 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Phthalic anhydride used for?
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Phthalic anhydride is primarily used in the production of plasticizers, polyester resins, alkyd resins for coatings, and dyes. It also serves as a valuable intermediate in organic chemical synthesis.
What are the CAS number and formula for Phthalic anhydride?
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The CAS number for Phthalic anhydride is 85-44-9, and its molecular formula is C8H4O3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Phthalic anhydride with an assay of 99%. We do not represent this product as USP, BP, EP, or pharmacopoeia grade.
How should Phthalic anhydride be handled safely?
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Phthalic anhydride is hazardous. It can cause severe eye damage, skin irritation, and respiratory irritation. Appropriate personal protective equipment, including eyeshields, face shields, gloves, and a dust mask (type N95 or equivalent), must be used. Ensure adequate ventilation and avoid generating dust.
How is Phthalic anhydride packed and shipped?
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Phthalic anhydride is typically packed in UN-approved containers and shipped according to international regulations for hazardous materials (UN 3077, Class 9, Packing Group III).
How can I request a sample or quote for Phthalic anhydride?
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To request a sample or obtain a quote for Phthalic anhydride, please contact our sales department through the website or by phone.
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