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2,6-二甲基吡啶(又称 2,6-卢剔啶、2,6-二甲基氮杂苯)为无色至淡黄色的透明液体,具有特殊的吡啶样气味并带薄荷/坚果香;久置或见光可能变黄。其为弱碱性杂环化合物,共轭酸 pKa 约 6.6。 |
2,6-Dimethylpyridine (also 2,6-lutidine, 2,6-dimethylpyridine) is a clear colorless-to-pale-yellow liquid with a characteristic pyridine-like odor and a minty/nutty note; it may darken on prolonged storage or light exposure. It is a weakly basic heterocycle (conjugate-acid pKa ca. 6.6). |
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本品是重要的有机合成中间体、空间位阻型弱碱与配体,广泛用于医药(可待因/氢化可的松/烟酸等中间体)、农药与染料助剂、树脂与橡胶硫化促进剂、香料香精(FEMA 3540),以及有机合成溶剂与催化剂。 |
An important organic-synthesis intermediate, sterically hindered weak base and ligand, widely used in pharma (intermediates for e.g. codeine / hydrocortisone / niacin), agrochemicals and dye auxiliaries, resin/rubber vulcanization accelerators, flavor & fragrance (FEMA 3540), and as solvent/catalyst in organic synthesis. |
产品标识 / Product Identification
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CAS 登记号 CAS No. |
108-48-5 |
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分子式 Molecular formula |
C7H9N |
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分子量 Molecular weight |
107.15 g/mol |
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EINECS 号 EINECS No. |
203-587-3 |
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Beilstein 号 Beilstein |
105690 |
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UN 编号 UN Number |
1993(第3类 易燃液体,包装类别 III,n.o.s.)/ Class 3 flammable liquid, Packing Group III, n.o.s. |
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HS 编码 HS Code |
2933.3999 |
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FEMA 号 FEMA No. |
3540(香料香精flavor & fragrance) |
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别名 Synonyms |
2,6-卢剔啶;2,6-二甲基氮杂苯;α,α'-卢剔啶, 2,6-Lutidine; α,α'-Lutidine; 2,6-Dimethyl pyridine |
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项目 Item |
指标 Specification |
测试方法 Test Method |
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2,6-二甲基吡啶含量 Assay (GC) |
≥ 98.0 % |
GC |
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水分 Water (KF) |
≤ 0.5 % |
GB/T 6283 / ASTM E1064 |
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外观 Appearance |
无色至淡黄色透明液体 / Clear colorless to pale yellow liquid |
Visual |
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折射率 Refractive index (n20/D) |
1.495 – 1.499 |
ASTM D1218 |
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密度 Density (25 °C) |
0.920 – 0.925 g/cm³ |
GB/T 4472 / ASTM D4052 |
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馏程 Distillation range (≥95% v/v) |
143 – 145 °C |
GB/T 7534 / ASTM D1078 |
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吡啶及其他异构体杂质 Pyridine & other isomers |
≤ 1.0 % |
GC |
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不挥发物 Non-volatile matter |
≤ 0.01 % |
GB/T 6324.2 |
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分子式 Molecular formula |
C7H9N |
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分子量 Molecular weight |
107.15 g/mol |
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外观 Appearance |
无色至淡黄色透明液体(久置可能变黄)/ Clear colorless to pale yellow liquid (may darken on storage) |
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气味 Odor |
特殊吡啶样气味,带薄荷/坚果香 Characteristic pyridine-like odor with minty/nutty note |
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熔点 Melting point |
-6 °C(文献 lit.) |
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沸点 Boiling point |
143 – 145 °C(文献 lit.) |
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密度 Density (25 °C) |
0.92 g/cm³(0.92 g/mL;文献 0.922–0.925) |
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相对蒸气密度 Vapor density (air=1) |
3.7 |
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蒸气压 Vapor pressure |
5.5 hPa(约 4.1 mmHg)@ 20 °C |
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闪点 Flash point (closed cup) |
33 °C(闭杯 CC;文献 32–38 °C lit. 32–38 °C) |
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自燃温度 Auto-ignition temp. |
未公开 Not available |
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爆炸极限 Explosive limits (air, v/v) |
estimate LEL~1.3 % / UEL~8.7 %) |
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折射率 Refractive index (n20/D) |
1.497(文献 1.495–1.501 lit. 1.495–1.501) |
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分配系数 log Pow (n-辛醇/水) |
1.68 |
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pKa(共轭酸 Conjugate acid) |
约 6.6 ca. 6.6 |
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溶解度 Solubility |
溶于水(约 163 g/L @ 25 °C);溶于乙醇、乙醚、丙酮 Soluble in water (ca. 163 g/L @ 25 °C); soluble in ethanol, ether, acetone |
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pH(水溶液 aq.) |
弱碱性,约 8–9 Weakly basic, ca. 8–9 |
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医药中间体:用于可待因、氢化可的松、烟酸等原料药的合成。 |
Pharmaceutical intermediate: synthesis of active ingredients such as codeine, hydrocortisone, niacin. |
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农药与染料助剂:除草剂、杀虫剂前体及染料、印染助剂。 |
Agrochemicals and dye auxiliaries: herbicide/pesticide precursors; dyeing and printing auxiliaries. |
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树脂与橡胶:硫化促进剂。 |
Resin and rubber: vulcanization accelerator. |
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香料香精:用于坚果、可可、咖啡、肉味等食用香精(FEMA 3540)。 |
Flavor & fragrance: nutty, cocoa, coffee, meat-type essences (FEMA 3540). |
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有机合成:空间位阻型弱碱、配体、溶剂与催化剂(酯化、交叉偶联等)。 |
Organic synthesis: sterically hindered weak base, ligand, solvent and catalyst (esterification, cross-coupling, etc.). |
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储存于阴凉、通风、干燥库房,库温不宜超过 30 °C,避光、密封保存;远离火种、热源。 |
Store in a cool, dry, well-ventilated area; temperature ≤ 30 °C; keep from light and tightly closed; away from ignition sources and heat. |
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使用防爆型电气与工具,采取防静电措施(接地/跨接);禁止使用压缩空气装卸。 |
Use explosion-proof equipment; prevent static discharge (ground/bond); no compressed-air transfer. |
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与强酸、强氧化剂、酸酐、酰卤分开存放,切忌混储;搬运轻装轻卸,防止包装破损。 |
Segregate from strong acids, strong oxidizers, acid anhydrides and acid halides; handle gently to avoid package damage. |
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操作人员佩戴防护手套与护目镜,加强通风,避免吸入蒸气或皮肤接触。 |
Wear gloves and goggles; ensure good ventilation; avoid vapor inhalation and skin contact. |
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200 L 钢桶(净含量约 180 kg,依密度)。 |
200 L steel drum (≈180 kg net, by density). |
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IBC 吨桶(如 800 / 1000 kg)。 |
IBC tote (e.g., 800 / 1000 kg). |
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槽车散装(可按客户需求提供)。 |
Bulk isotank (available on request). |
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注意:容器须符合 UN 危险货物包装要求(第3类易燃液体,PG III)。 |
Note: containers must meet UN hazardous-goods packaging requirements (Class 3, PG III). |
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在原包装、密闭、阴凉干燥(建议 ≤30 °C,避光)条件下,保质期通常 24 个月(以 COA/标签为准)。 |
Typically 24 months under original sealed packaging, cool and dry (≤30 °C, away from light); subject to COA/label. |
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GHS 危险性分类:易燃液体 类别3(H226 易燃液体和蒸气);急性经口毒性 类别4(H302 吞咽有害);皮肤刺激 类别2(H315 引起皮肤刺激);严重眼刺激 类别2(H319 引起严重眼刺激);特异性靶器官毒性-单次接触 类别3(H335 可能引起呼吸道刺激)。信号词:警告;象形图:GHS02 + GHS07。 |
GHS classification: Flammable liquids Cat. 3 (H226); Acute tox. oral Cat. 4 (H302); Skin irritation Cat. 2 (H315); Eye irritation Cat. 2 (H319); STOT-SE Cat. 3 (H335 respiratory irritation). Signal word: Warning; pictograms: GHS02 + GHS07. |
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本品易燃,蒸气与空气可形成爆炸性混合物;吞咽有害,引起皮肤及严重眼刺激,吸入可能引起呼吸道刺激(详见独立安全数据表 SDS)。 |
Flammable; vapour may form explosive mixtures with air; harmful if swallowed; causes skin and serious eye irritation; may cause respiratory irritation if inhaled (see separate SDS). |
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灭火用干粉、二氧化碳、泡沫或砂土;禁用直流水。 |
Use dry powder, CO2, foam or sand; avoid water jet. |
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运输信息 Transport:UN 1993,第3类 易燃液体,包装类别 III;正确运输名称:易燃液体,未另作规定的(含 2,6-二甲基吡啶)/ Flammable liquid, n.o.s. (contains 2,6-Dimethylpyridine)(IMDG / IATA / ADR 一致)。 |
Transport: UN 1993, Class 3 flammable liquid, Packing Group III; proper shipping name: Flammable liquid, n.o.s. (contains 2,6-Dimethylpyridine) (IMDG / IATA / ADR consistent). |
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法规 Regulatory:列入中国《危险化学品目录》(2015版)及《中国现有化学物质名录》(IECSC);德国水危害等级 WGK 3。 |
Regulatory: listed in China's Catalogue of Hazardous Chemicals (2015) and IECSC (Inventory of Existing Chemical Substances); WGK 3 (Germany water-hazard class). |
免责声明 / Disclaimer
本技术数据表(TDS)所载信息基于公开标准、行业惯例及供应商提供的数据编制,仅供用户参考,不构成任何明示或暗示的担保。
The information in this Technical Data Sheet (TDS) is compiled from published standards, general industry practice, and data supplied by the manufacturer/supplier. It is provided for the user's reference only and constitutes no express or implied warranty of any kind.
表中规格为工业级典型参考值,具体指标以每批次《分析合格证(COA)》为准;用户应自行确认产品对特定用途的适用性与合规性,并遵守所在地法律法规。
The specifications listed are typical reference values for industrial grade; actual values are subject to the Certificate of Analysis (COA) of each batch. Users shall independently verify the product's suitability and regulatory compliance for the intended use and shall comply with applicable laws and regulations.
在法律允许的最大范围内,重庆广益化工有限公司不对因使用本数据表或本产品而产生的任何损失、损害或后果承担责任。
To the maximum extent permitted by law, Chongqing Guangyi Chemical Co., Ltd. shall not be liable for any loss, damage, or consequence arising from the use of this data sheet or this produc