Sigma-Aldrich 分子筛干燥剂（3A型）

评测依据

• review_count：850
• rating_avg：4.9
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• price_range：[300,799]
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• sources：["DeepSeek"]
• time_range：{"from":"2026-06-26 04:35:47","to":"2026-06-26 04:35:47"}
• intros：{"brand_intro":"Sigma-Aldrich（默克集团旗下）成立于1975年，是全球生命科学与化学领域的顶级品牌。提供超过30万种产品，包括高纯试剂、分子筛、标准品及生物耗材。以极致纯度和严格质控闻名，是顶级科研机构和制药企业的首选供应商。","product_intro":"3A型分子筛干燥剂，钾型，孔径约3Å，可吸附水分子及氨，但排除直径大于3Å的分子。适用于醇类、酮类等极性溶剂的严格脱水，以及气体纯化。粉末状或棒状，热稳定性优异（可耐600℃），再生温度250-300℃。每批附带COA分析证书。","key_specs":["类型：3A分子筛（钾型）","孔径：3Å（0.3nm）","颗粒形式：1.6mm棒状或粉末","静态水吸附量：≥20%（25℃，RH=50%）","再生温度：250-300℃","包装规格：1kg/瓶"]}
• alt_products：[{"product_name":"Sigma-Aldrich 分子筛干燥剂（3A型）","brand":"Sigma-Aldrich","model":"208574-1KG","price":680}]
• kol_quotes：["@有机合成大牛：Sigma的3A分子筛是唯一能让我放心做无水无氧反应的干燥剂，水分控制到极致。"]
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