Description

Cellulose, Hydrogen Phthalate is a high-purity, white to off-white powder widely recognized as a key pharmaceutical excipient. This compound is valued for its enteric coating properties, ensuring targeted drug release in the gastrointestinal tract. It is essential for manufacturers in the pharmaceutical, nutraceutical, and specialty chemical industries seeking reliable, compliant raw materials for controlled-release formulations.

Application

• Pharmaceutical Enteric Coatings: Primary use as a pH-dependent polymer for tablet and capsule coatings to protect active ingredients from gastric acid.
• Controlled-Release Drug Delivery Systems: A critical component in matrix systems designed for sustained or delayed drug release profiles.
• Nutraceutical and Dietary Supplement Coatings: Used to mask taste or odor and to deliver sensitive nutrients to the intestine.
• Microencapsulation: Employed to encapsulate flavors, enzymes, or other sensitive materials for protection and controlled release.
• Specialty Adhesives and Binders: Finds application in niche industrial formulations requiring specific film-forming or binding characteristics.

Basic Information

Product Name	Cellulose, Hydrogen Phthalate
CAS No.	9004-44-8
Molecular Formula	(C6H7O2(CO)2C6H4)n
Molecular Weight	Variable (Polymer)
Synonyms	Cellulose Acetate Phthalate; CAP; Cellacefate; Cellulose Acetate 1,2-Benzenedicarboxylate; Phthalic Acid Cellulose Acetate Ester; Acetyl Phthalyl Cellulose; Enteric Coating Polymer; NF 11; EINECS 232-903-6
EINECS	232-903-6

Quality Control

Our Cellulose, Hydrogen Phthalate is manufactured under a strict quality management system. It is tested against relevant pharmacopeial standards such as USP-NF and Ph. Eur. for key parameters including identification, assay, free acidity, and phthalyl content. A comprehensive Certificate of Analysis (COA) is provided with each batch to ensure traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	White or off-white free-flowing powder
Identification (IR)	Conforms to standard
Assay (Phthalyl Content)	30.0% - 36.0%
Free Acid (as Phthalic Acid)	NMT 3.0%
Acetyl Content	Contact for details
Viscosity (10% solution)	Contact for details
Loss on Drying	NMT 5.0%
Residue on Ignition	NMT 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.