Lipid excipient group and applications in pharmaceuticals

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1. General introduction to lipid excipients and applications:

Lipid excipients are a group of excipients derived from fats, including oils, waxes, phospholipids, and other lipid derivatives. They are widely used in pharmaceutical formulation and manufacturing with the following applications:

Solid dosage forms

Lubricants/Glidants: Reduce friction between the tablet and the punches and dies during the tableting process, creating a glossy and aesthetically pleasing appearance for the finished tablets.
Sustained-release matrix excipients: The lipid matrix helps control the release of the active pharmaceutical ingredient (API) through a diffusion mechanism (non-swelling or eroding).
Taste-masking excipients: Mask the taste of bitter APIs by forming a thin lipid film around them, isolating the API from the taste receptors that perceive bitterness.
Base system for suppositories.

Liquid dosage forms (injectables, oral liquids)

Oil carriers.
Formulation of emulsifying and self-emulsifying drug delivery systems (SMEDDs/SNEDDs).
Formulation of nanostructured targeted delivery systems such as nanoemulsions, SLNs (Solid Lipid Nanoparticles), liposomes, etc.
Improving solubility and bioavailability for poorly soluble/poorly permeable APIs.
Thickening, suspending, and stabilizing APIs.

Semi-solid dosage forms (soft gelatin capsule fills, topical formulations)

Carriers for the oil phase.
Improving solubility and bioavailability for poorly soluble/poorly permeable APIs.
Enhancing skin permeability for topical drugs.
Thickening, suspending, and stabilizing APIs.

2. Common lipid excipients

Application	Some lipid excipients	General advantages
Lubricants/Glidants	Glyceryl dibehenate, Glyceryl monostearate, Hydrogenated castor oil	Creates a glossy and aesthetically pleasing appearance for the tablets. Overcomes the incompatibility and metallic taste disadvantages of MgSt (Magnesium Stearate).
Sustained-release agents	Glyceryl dibehenate, cetyl alcohol, stearyl alcohol	Creates a matrix frame that controls API release via a diffusion mechanism; non-swelling and non-eroding. Minimizes dose dumping (rapid burst release).
Taste-masking excipients	Glyceryl dibehenate, Glyceryl monostearate	Effective taste masking; can be used for various APIs without requiring specific binding.
Oil carriers	MCT oil, soybean oil, castor oil	Increases solubility and bioavailability. Supports nutritional supplementation for the product (e.g., MCT oil)
Thickening and suspending agents	Hydrogenated castor oil, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, glyceryl monostearate, various waxes	Increases viscosity, helping to adjust the physical consistency of liquid and semi-solid dosage forms, thereby suspending and stabilizing the API more effectively.
Improving solubility, bioavailability	MCT oil, PEG hydrogenated castor oil, glycerol esters, PEG esters	Improves solubility and bioavailability for poorly soluble APIs. Used in formulating targeted drug delivery systems and reducing side effects.

Note:The lipid excipients listed in the table above are common ones, provided for reference, and are not exhaustive. In practice, lipid excipients can be used for many different applications depending on the formulator's needs and the manufacturer's specific product characteristics.

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{"id":745349,"name":"Lipid excipient group and applications in pharmaceuticals","desc":"Lipid excipients are a group of excipients derived from fats, including oils, waxes, phospholipids, and other lipid derivatives. They are widely used in pharmaceutical formulation and manufacturing<\/p>","content":"<h2>1. General introduction to lipid excipients and applications:<\/strong>&nbsp;<\/h2>Lipid excipients are a group of excipients derived from fats, including oils, waxes, phospholipids, and other lipid derivatives. They are widely used in pharmaceutical formulation and manufacturing with the following applications:<\/p>&nbsp;<\/p><figure class=\"image\"><img src=\"\/datafiles\/88336\/upload\/images\/Avatar sản phẩm\/SEO WEB IMAGE 1 (1).jpg\" alt=\"\"><\/figure><h4>Solid dosage forms<\/strong><\/span><\/h4><ul><li>Lubricants\/Glidants:<\/strong> Reduce friction between the tablet and the punches and dies during the tableting process, creating a glossy and aesthetically pleasing appearance for the finished tablets.<\/li><li>Sustained-release matrix excipients:<\/strong> The lipid matrix helps control the release of the active pharmaceutical ingredient (API) through a diffusion mechanism (non-swelling or eroding).<\/li><li>Taste-masking excipients:<\/strong> Mask the taste of bitter APIs by forming a thin lipid film around them, isolating the API from the taste receptors that perceive bitterness.<\/li><li>Base system for suppositories.<\/strong><\/li><\/ul><figure class=\"image\"><img src=\"\/datafiles\/88336\/upload\/images\/ChatGPT Image 08_54_19 22 thg 5, 2026 (1).png\" alt=\"\"><\/figure><h4>Liquid dosage forms (injectables, oral liquids)<\/strong><\/span><\/h4><ul><li>Oil carriers.<\/li><li>Formulation of emulsifying and self-emulsifying drug delivery systems (SMEDDs\/SNEDDs).<\/li><li>Formulation of nanostructured targeted delivery systems such as nanoemulsions, SLNs (Solid Lipid Nanoparticles), liposomes, etc.<\/li><li>Improving solubility and bioavailability for poorly soluble\/poorly permeable APIs.<\/li><li>Thickening, suspending, and stabilizing APIs.<\/li><\/ul><h4>Semi-solid dosage forms (soft gelatin capsule fills, topical formulations)<\/strong><\/span><\/h4><ul><li>Carriers for the oil phase.<\/li><li>Improving solubility and bioavailability for poorly soluble\/poorly permeable APIs.<\/li><li>Enhancing skin permeability for topical drugs.<\/li><li>Thickening, suspending, and stabilizing APIs.<\/li><\/ul><h2>2. Common lipid excipients<\/strong><\/h2><figure class=\"table\"><table><tbody><tr><td style=\"background-color:#0070c0;border:1px solid rgb(196, 199, 197);padding:8px 12px;\">&nbsp;<\/p>Application<\/strong><\/span><\/p>&nbsp;<\/p><\/td><td style=\"background-color:#0070c0;\">Some lipid excipients<\/strong><\/span><\/p><\/td><td style=\"background-color:#0070c0;\">General advantages<\/strong><\/span><\/p><\/td><\/tr><tr><td>Lubricants\/Glidants<\/strong><\/span><\/td><td>Glyceryl dibehenate, Glyceryl monostearate, Hydrogenated castor oil<\/td><td><ul><li>Creates a glossy and aesthetically pleasing appearance for the tablets.<\/li><li>&nbsp;Overcomes the incompatibility and metallic taste disadvantages of MgSt (Magnesium Stearate).<\/li><\/ul><\/td><\/tr><tr><td>Sustained-release agents<\/strong><\/span><\/td><td>Glyceryl dibehenate, cetyl alcohol, stearyl alcohol<\/td><td><ul><li>Creates a matrix frame that controls API release via a diffusion mechanism; non-swelling and non-eroding.<\/li><li>Minimizes dose dumping (rapid burst release).<\/li><\/ul><\/td><\/tr><tr><td>Taste-masking excipients<\/strong><\/span><\/td><td>Glyceryl dibehenate, Glyceryl monostearate<\/td><td><ul><li>Effective taste masking; can be used for various APIs without requiring specific binding.<\/li><\/ul><\/td><\/tr><tr><td>Oil carriers<\/strong><\/span><\/td><td>MCT oil, soybean oil, castor oil<\/td><td><ul><li>Increases solubility and bioavailability.<\/li><li>Supports nutritional supplementation for the product (e.g., MCT oil)<\/li><\/ul><\/td><\/tr><tr><td>Thickening and suspending agents<\/strong><\/span><\/td><td>Hydrogenated castor oil, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, glyceryl monostearate, various waxes<\/td><td><ul><li>&nbsp;Increases viscosity, helping to adjust the physical consistency of liquid and semi-solid dosage forms, thereby suspending and stabilizing the API more effectively.<\/li><\/ul><\/td><\/tr><tr><td>Improving solubility, bioavailability<\/strong><\/span><\/td><td>MCT oil, PEG hydrogenated castor oil, glycerol esters, PEG esters<\/td><td><ul><li>Improves solubility and bioavailability for poorly soluble APIs.<\/li><li>Used in formulating targeted drug delivery systems and reducing side effects.<\/li><\/ul><\/td><\/tr><\/tbody><\/table><\/figure>Note:<\/strong><\/span> The lipid excipients listed in the table above are common ones, provided for reference, and are not exhaustive. In practice, lipid excipients can be used for many different applications depending on the formulator's needs and the manufacturer's specific product characteristics.<\/i><\/p>","image_url":"https:\/\/www.biorichgroup.com\/datafiles\/88336\/upload\/images\/2026-03\/32fddbed607f673c62e64c0665cc0953.jpg?t=1773996098","image_thumb_url":"https:\/\/www.biorichgroup.com\/datafiles\/88336\/upload\/thumb_images\/2026-03\/32fddbed607f673c62e64c0665cc0953.jpg?t=1780394649","tags":["Lipid excipients","Pharmaceutical lipid excipientsPharmaceutical lipid excipients","Applications of lipid excipientsApplications of lipid excipients","Lipidbased drug delivery systems"],"count_view":72,"seo_name":"lipid-excipient-group-and-applications-in-pharmaceuticals","date_update":1779413100,"date_created_format":1779416060,"meta_title":"Lipid excipient group and applications in pharmaceuticals","meta_desc":"Lipid excipients are a group of excipients derived from fats, including oils, waxes, phospholipids, and other lipid derivatives. 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Risks of Nitrosamine Impurities in Pharmaceutical Raw Materials","desc":"Learn what nitrosamines are, how they form in APIs and excipients, the associated risks, and current regulatory limits for pharmaceutical raw materials.&nbsp;<\/span><\/p>","content":"<figure class=\"image\"><img src=\"\/datafiles\/88336\/upload\/images\/Tin kỹ thuật\/Nitrosamine banner.jpg\" alt=\"\"><\/figure><h2>1. What are Nitrosamines?<\/strong><\/span><\/h2>Nitrosamines are a class of compounds containing the&nbsp;<\/span>N-nitroso functional group (-N–N=O)<\/strong>.<\/span> They are generally formed through the reaction of amines with nitrosating agents, particularly nitrite under acidic conditions.<\/span><\/p>Nitrosamines of pharmaceutical concern include:<\/span><\/p><ul><li>N-Nitrosodimethylamine (NDMA)<\/strong><\/span><\/li><li>N-Nitrosodiethylamine (NDEA)<\/strong><\/span><\/li><li>N-Nitrosoethylisopropylamine (NEIPA)<\/strong><\/span><\/li><li>N-Nitrosodiisopropylamine (NDIPA)<\/strong><\/span><\/li><li>N-Nitrosodibutylamine (NDBA)<\/strong><\/span><\/li><\/ul>Many nitrosamines are classified as&nbsp;<\/span>mutagenic impurities<\/strong> <\/span>and several have been identified as probable human carcinogens. Their presence in pharmaceutical products has become a major regulatory concern since the discovery of NDMA contamination in&nbsp;<\/span>Valsartan<\/strong><\/span> products in 2018, which resulted in multiple product recalls worldwide.<\/span><\/p><h2>2. Nitrosamine Formation in APIs and Pharmaceutical Excipients<\/strong><\/span><\/h2>Nitrosamine formation requires three fundamental elements:<\/span><\/p><ul><li>An amine source<\/span><\/li><li>A nitrosating agent (typically nitrite)<\/span><\/li><li>Suitable reaction conditions such as moisture, temperature, and pH<\/span><\/li><\/ul>In pharmaceutical manufacturing, nitrosamines are not intentionally introduced. Instead, they may be generated during API synthesis, excipient manufacturing, formulation, or storage.<\/span><\/p><figure class=\"image\"><img src=\"\/datafiles\/88336\/upload\/images\/Tin kỹ thuật\/Nitrosamine flowchart.jpg\" alt=\"\"><\/figure><h3>a. API synthesis<\/strong><\/span><\/h3>API manufacturing processes frequently involve amines, amide-containing reagents, or nitrite salts. When these substances are present simultaneously under favorable conditions, nitrosamines may form as process-related impurities.<\/span><\/p>Common precursors include:<\/span><\/p><ul><li>Dimethylamine<\/span><\/li><li>Diethylamine<\/span><\/li><li>Triethylamine<\/span><\/li><li>Sodium nitrite<\/span><\/li><li>Potassium nitrite<\/span><\/li><\/ul>For example: <\/span>Dimethylamine + Nitrite → NDMA.<\/strong><\/span> <\/strong>This reaction pathway was identified as one of the primary sources of nitrosamine contamination in several sartan APIs.<\/span><\/p><h3>b. Recovered solvents<\/strong><\/span><\/h3>Recovered or recycled solvents may contain residual amines or trace levels of nitrosamines. Without adequate purification and process control, repeated solvent reuse can increase nitrosamine levels during API manufacturing.<\/span><\/p><h3>c. Nitrite impurities in raw materials<\/strong><\/span><\/h3>Trace nitrite may be introduced through: <\/span>Purified water, inorganic reagents, pharmaceutical excipients, synthetic intermediates. <\/strong><\/span>Although typically present at ppm or ppb levels, nitrite impurities may react with susceptible amines over time to generate nitrosamines.<\/span><\/p><h3>d. API degradation<\/strong><\/span><\/h3>Certain APIs containing secondary or tertiary amine structures may generate nitrosamines during storage. Factors influencing degradation include: Elevated temperature, High humidity, Nitrite contamination. Nitrosamine formation through degradation has been reported for APIs such as&nbsp;<\/span>Ranitidine<\/strong><\/span> and&nbsp;<\/span>Nizatidine<\/strong>.<\/span><\/p><h2>3. Pharmaceutical Materials Associated with Nitrosamine Risk<\/strong><\/span><\/h2><h3>a. Active Pharmaceutical Ingredients (APIs)<\/strong><\/span><\/h3>APIs containing secondary or tertiary amine functionalities generally present a higher risk for nitrosamine formation. Examples include: Metformin, Ranitidine, Nizatidine, Doxylamine, Varenicline, Valsartan, Losartan, Irbesartan<\/span><\/p><figure class=\"image\"><img src=\"\/datafiles\/88336\/upload\/images\/Tin kỹ thuật\/Nitrosamine in Active.jpg\" alt=\"\"><\/figure><h3>b. Pharmaceutical Excipients<\/strong><\/span><\/h3>Although excipients are not typically direct sources of nitrosamines, some may contribute to nitrosamine formation. Potential risk factors include:<\/span><\/p><ul><li>Nitrite-containing excipient:<\/strong><\/span> <\/strong>Nitrite impurities may be present at trace levels depending on the manufacturing process and raw material source.<\/span><\/li><li>Amine-containing excipients: <\/strong><\/span>Excipients containing amine functionalities may react with nitrite under suitable conditions to generate nitrosamines.<\/span><\/li><\/ul><figure class=\"image\"><img src=\"\/datafiles\/88336\/upload\/images\/Tin kỹ thuật\/Nitrosamine in Excipients_.jpg\" alt=\"\"><\/figure><h2>4. Regulatory Limits for Nitrosamine Impurities<\/strong><\/span><\/h2>Global regulatory agencies, including the FDA and EMA, have established acceptable intake (AI) limits for nitrosamine impurities based on toxicological risk assessment. The acceptable intake limits for commonly encountered nitrosamines are summarized in the table below. <\/span>Note:<\/strong><\/span> 1 ng = 10⁻⁶ mg. For the latest acceptable intake limits, refer to the<\/span>&nbsp;CDER Nitrosamine Impurity Acceptable Intake Limits<\/strong> <\/span>guidance.<\/span><\/p><figure class=\"image\"><img src=\"\/datafiles\/88336\/upload\/images\/Tin kỹ thuật\/Nitrosamine impurities.jpg\" alt=\"\"><\/figure>","image_url":"https:\/\/www.biorichgroup.com\/datafiles\/88336\/upload\/images\/Avatar%20s%E1%BA%A3n%20ph%E1%BA%A9m\/1.png","image_thumb_url":"https:\/\/www.biorichgroup.com\/datafiles\/88336\/upload\/thumb_images\/Avatar%20s%E1%BA%A3n%20ph%E1%BA%A9m\/1.png","tags":["Nitrosamine","Pharmaceutical Impurities","API","Excipients","NDMA","NDEA","Genotoxic Impurities","Pharmaceutical Raw Materials","Drug Safety","Quality Control","Regulatory Affairs","ICH M7","FDA","EMA"],"count_view":98,"seo_name":"what-is-nitrosamine-risks-of-nitrosamine-impurities-in-pharmaceutical-raw-materials","date_update":1783585620,"date_created_format":1783593944,"meta_title":"What Is Nitrosamine? 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