Overview
Lactose for Injection is a critical excipient in parenteral drug manufacturing, specifically processed to meet pharmacopoeial standards for injectable formulations. Unlike food-grade lactose, this variant undergoes additional purification steps including membrane filtration and terminal sterilization to achieve ultra-low endotoxin levels (<0.5 IU/g). The monohydrate crystalline form provides predictable lyophilization behavior, making it particularly valuable for stabilizing biologics and vaccines during freeze-drying processes. Pharmaceutical manufacturers prefer lactose for injection due to its established regulatory acceptance across major markets (US FDA, EMA, PMDA). Its reducing sugar properties can be mitigated through proper formulation design, while its low chemical reactivity minimizes interactions with active pharmaceutical ingredients (APIs). Batch-to-batch consistency in particle morphology ensures reproducible compaction characteristics in vial filling operations.
Physical and Chemical Properties
The material exhibits characteristic α-lactose monohydrate crystalline structure confirmed by X-ray diffraction, with typical water content of 4.5-5.5% w/w. Particle size distribution is tightly controlled through jet milling to optimize flow properties for automated filling machines, with D90 values commonly specified between 100-200 μm. The crystalline form demonstrates excellent compressibility with Hausner ratios <1.25, crucial for uniform cake formation during lyophilization. Chemically, injection-grade lactose shows <0.1% protein content and <0.05% heavy metals to prevent immunogenic reactions. Its reducing sugar behavior (approximately 0.7% free aldehyde groups) requires consideration when formulating with amine-containing drugs to avoid Maillard reactions. The product's low conductivity (<20 μS/cm in 10% solution) indicates minimal ionic impurities that could affect sensitive biologics.
Main Applications
Primary use is as a bulking agent in lyophilized injectables, constituting 50-90% of freeze-dried cake formulations for antibiotics like cephalosporins. In vaccine production, it stabilizes live attenuated viruses by forming glassy matrices during lyophilization, with demonstrated efficacy in measles and rubella vaccines. Recent applications include monoclonal antibody formulations where lactose protects protein conformation during freezing cycles. The excipient also serves as a carrier for dry powder inhalers (DPI) when micronized to 2-5 μm particles. Emerging uses include cell therapy cryopreservation, where its osmotic properties help maintain cell viability. Specialized variants include spray-dried lactose for improved solubility in prefilled syringes and lactose-sucrose blends for enhanced thermal protection of labile biologics.
Safety and Storage
Sterile handling in ISO Class 5 environments is mandatory to maintain compendial sterility assurance levels (SAL ≤10^-6). The material is sensitive to Maillard reactions at elevated temperatures - long-term storage above 30°C can cause browning. Original double-layer polyethylene bags with desiccant should remain sealed until use, with in-process holds not exceeding 48 hours after opening. From a toxicological perspective, lactose for injection is generally recognized as safe (GRAS), though residual β-lactose content should be <0.3% to minimize potential anaphylactoid reactions. Facilities must implement dust control measures due to explosion risks (minimum explosive concentration 60 g/m³). Stability studies typically demonstrate 3-year shelf life when stored below 25°C/60% RH in validated packaging.
B2B Procurement Guide
Pharmaceutical buyers should verify compliance with current USP <31> and EP 3.2.1 monographs, specifically testing for absent bovine proteins (risk of TSE/BSE). Audit suppliers for ISO 13485 certification if intended for medical devices. Key procurement specifications include: particle size distribution (laser diffraction method), residual solvents (<500 ppm methanol), and microbial limits (<10 CFU/g). For biosimilar applications, request extractables/leachables profiles from container closure systems. Large-volume contracts (>1 metric ton) often include value-added services like custom particle engineering or gamma irradiation. Emerging market alternatives include plant-derived lactose for vegan formulations, though regulatory pathways remain under development. Lead times for GMP-grade material typically range 8-12 weeks with validated cold chain logistics.
Related Manufacturers
- 主营：海藻糖、甘油、泊洛沙姆、药用辅料、丙二醇、倍他环糊精、聚山梨酯80、聚乙二醇、氯化钠、三氯蔗糖
- 主营：药用级海藻糖、药用级蜂蜜、药用级甘油、药用级石蜡、药用级羟丙甲纤维素、药用级二甲基亚砜、药用级注射蔗糖、药用级羟苯乙酯、药用级硬脂酸、药用羟丙基倍他环糊精、药用卡波姆均聚物、药用糖精钠、药用三氯蔗糖、药用阿司帕坦、药用甘羟铝、药用胶囊用明胶、药用聚维酮K30、药用二甲硅油、聚丙烯酸钠NP700
- 主营：苯甲醇、三乙醇胺、甜菊糖苷、注射级海藻糖、注射级甘露醇、注射级木糖醇、注射级甘油、牛磺酸、醋酸钠、木糖醇、黄原胶、甘露醇、大豆油、薄荷脑、二甲硅油、卡波姆、枸橼酸、磷酸氢二钠、磷酸氢二钾、明胶、十六醇、十八醇、聚维酮k30
- 主营：甲基纤维素、卡波姆、聚维酮K30、药用蜂蜜、注射用蔗糖、甘油、丙二醇、月桂氮卓酮、麦芽糖、三氯蔗糖、羟苯乙酯、羟苯丙酯、液状石蜡、固体石蜡、三乙醇胺、依地酸二钠、焦亚硫酸钠、苯扎溴铵、泊洛沙姆188/407、明胶、甜菊糖苷
- 主营：药用级蜂蜜、药用级海藻糖、药用级卡波姆、药用级泊洛沙姆、药用级交联羧甲纤维素、药用级三乙醇胺、药用级羟苯甲酯、药用级聚丙烯酸钠、药用级甘羟铝、药用级聚山梨酯80、药用级壳聚糖、药用级甘油、药用级丙二醇、药用级蓖麻油
- 主营：酸碱平衡调节剂、药典四部海藻糖、甲基纤维素、药用级香草醛、药用级三氯蔗糖、药用羊毛脂、药用级苯扎氯铵、药用级无水碳酸钠、药用级焦糖、药用级明胶、药用级三乙醇胺、药用级十六醇、药用级大豆油、药用十八醇、药用级苯甲酸钠、药用级二甲硅油、药用级氧化锌、药用1.3丁二醇、药用甘油、甜菊糖苷、三氯蔗糖、乙基纤维素、可溶性淀粉、轻质液状石蜡、聚山梨酯80
- 主营：丙二醇、聚乙烯醇、巴斯夫进口泊洛沙姆188、乳糖、泊洛沙姆407、聚氧乙烯氢化蓖麻油、np700、甘油、hs15、二甲基亚砜、聚维酮、凡士林、枸橼酸、磷酸二氢钠、高岭土、海藻糖、滑石粉、黄原胶、聚山梨酯、卡波姆、壳聚糖、明胶、三氯蔗糖、蓖麻油、酒石酸
- 主营：增溶剂、聚乙二醇、泊洛沙姆、乳糖、枝共聚物、微晶纤维素、聚醋酸乙烯酯、羟基硬脂酸酯、聚乙烯己内酰胺
- 主营：甘露醇、糖精钠、水杨酸、药用级乳糖、樟脑、冰片、薄膜包衣粉、糊精、人工牛黄、醋酸氯己定、碳酸氢钠、氯化铵、二甲基亚砜、黄白凡士林、大豆卵磷脂、蛋黄卵磷脂、黄原胶、聚山梨酯80、葡萄糖、羟苯乙酯、氯化钠、碳酸钙、硫酸镁、升华硫
- 主营：药用辅料、二甲硅油、甜菊糖苷