• 乳酸  Lactic Acid,Chongqing Guangyi Chemical Co., Ltd,乳酸  Lactic Acid
  • 乳酸  Lactic Acid,Chongqing Guangyi Chemical Co., Ltd,乳酸  Lactic Acid

乳酸 Lactic Acid

No.CAS 50-21-5
Lactic acid serves as acidity regulator and preservative in food and beverage industry. It is used in cosmetic formulations for skin‑care products. It also applies in pharmaceutical preparations, textile dyeing, leather tanning and raw material for biodegradable polylactic acid synthesis.
Download
View all downloads
  • 乳酸  Lactic Acid,Chongqing Guangyi Chemical Co., Ltd,乳酸  Lactic Acid

Description

  1. 产品标识 / Product Identification

产品名称 Product Name

乳酸 / Lactic Acid (Industrial Grade, 80% aqueous solution)(2-羟基丙酸、α-羟基丙酸、丙醇酸 / 2-Hydroxypropanoic acid, α-Hydroxypropionic acid)

别名 Synonyms

2-羟基丙酸、α-羟基丙酸、丙醇酸 / 2-Hydroxypropanoic acid, α-Hydroxypropionic acid

化学式 Formula

C₃H₆O₃

分子量 Molecular Weight

90.08 g/mol

CAS 登记号 CAS No.

50-21-5

EC / EINECS 号

200-018-0

食品添加剂号 E-Number

E 270

海关编码 HS Code

2918.11

PubChem CID

612

InChIKey

JVTAAEKCZFNVCJ-UHFFFAOYSA-N

主要用途 Primary Use

食品酸度调节/防腐(E270)、乳酸酯/聚乳酸(PLA)原料、清洗剂、电镀、医药 / Food acidulant (E270), PLA precursor, cleaning, electroplating



  1. 组分信息 / Composition

主要成分 Main Component

乳酸 C₃H₆O₃ ≥ 80.0%(工业级水溶液)/ Lactic acid C₃H₆O₃ ≥ 80.0% (industrial aqueous solution)

杂质 Impurities

氯化物、硫酸盐、铁、重金属、灼烧残渣、还原糖、色度 / Chlorides, Sulfates, Iron, Heavy metals, Residue on ignition, Reducing sugars, Color


  1. 理化性质 / Physical & Chemical Properties

外观 Appearance

无色至淡黄色透明粘稠液体(80% 工业级水溶液),无臭 / Colorless to pale-yellow viscous liquid (80% industrial solution), odorless

分子量 MW

90.08 g/mol

熔点 MP

约 18 °C(纯品);80% 溶液常温下为液体 / ~18 °C (pure); 80% solution liquid at room temp

沸点/分解 BP / Decomp.

122 °C(15 mmHg);常压下受热分解/聚合 / 122 °C @15 mmHg; decomposes/polymerizes at atm.

密度 Density

1.206 – 1.210 g/cm³(25 °C,80-88% 溶液)

水中溶解度 Solubility (H₂O)

与水、乙醇完全混溶 / Miscible with water and ethanol

其他溶剂溶解度 in other

与水混溶;微溶于乙醚 / Miscible with water; slightly in ether

pH

近酸性,饱和溶液 pH ≈ 2.0 – 2.5 / Weakly acidic; saturated solution pH ≈ 2.0–2.5

pKa

3.86(25 °C,水)/ 3.86 (25 °C, water)

晶体结构 Crystal Structure

—(液态) / Liquid

折射率 Refractive Index

nD ≈ 1.439(20 °C)

吸湿/潮解 Hygroscopicity

有吸湿性 / Hygroscopic


  1. 典型产品规格 / Typical Product Specifications (Industrial Grade)

项目 Item

典型值 Typical

测试方法 Method

总酸含量 Total acid

≥ 80.0%

滴定 / Titration

氯化物(以 Cl 计)Chlorides

≤ 0.01%

滴定 / Titration

硫酸盐(以 SO₄ 计)Sulfates

≤ 0.05%

浊度法 / Turbidimetry

铁(以 Fe 计)Iron

≤ 20 mg/kg

AAS / ICP

重金属(以 Pb 计)Heavy metals

≤ 10 mg/kg

AAS / ICP

灼烧残渣 Sulfated ash

≤ 3.0%

重量法 / Gravimetric

色度 Color (APHA)

≤ 50(食品级 food grade);工业级可协商(industrial grade negotiable)

比色 / Colorimetry

密度 Density

1.206 – 1.210 g/cm³

密度计 / Densitometer

注:上述为工业级 80% 乳酸水溶液典型指标,可参照 GB 1886.173-2016(食品添加剂 乳酸)、GB 2023-2003 及 unitechemi / sinowin 供应商公开规格。L-乳酸 CAS 79-33-4、D-乳酸 CAS 10326-41-7;CAS 50-21-5 为未指定立体构型(常见工业级多为 DL/L 混合物或 L-富集)。具体数值以重庆广益化工出厂检验单(COA)为准。 / Industrial 80% aq. per GB 1886.173-2016, GB 2023-2003 and supplier TDS. L-lactic CAS 79-33-4, D-lactic CAS 10326-41-7; CAS 50-21-5 unspecified stereochemistry. Values per batch COA.

  1. 用途 / Applications
  • 食品:E270 酸度调节剂、防腐剂、增味剂(饮料、酱料、肉制品)

Food: E270 acidulant, preservative, flavor enhancer (beverages, sauces, meat)

  • 化工:合成乳酸乙酯等酯类、聚乳酸(PLA)单体

Chemicals: esters e.g. ethyl lactate, polylactic acid (PLA) monomer

  • 清洗:水垢去除、金属表面处理

Cleaning: descaling, metal surface treatment

  • 电镀:镍/锌电镀络合剂、pH 缓冲

Electroplating: complexing agent for Ni/Zn plating, pH buffer

  • 医药:输液、pH 调节、皮肤护理(AHA)

Pharma: infusion, pH adjustment, skin care (AHA)

  • 饲料:酸化剂、促生长

Feed: acidifier, growth promoter

  • 食品酸度调节(E270)、PLA 原料、清洗、电镀、医药

Food acidulant (E270), PLA feedstock, cleaning, electroplating, pharma

  1. 储存与操作 / Storage & Handling
  • 密封存放于阴凉、干燥、通风处,避免暴晒与高温

Store sealed in cool, dry, ventilated place; avoid sunlight and high temperature

  • 与强碱、强氧化剂分开存放

Segregate from strong bases and oxidizers

  • 操作时佩戴耐酸手套、护目镜、防毒面具/口罩

Wear acid-resistant gloves, goggles, respirator/mask when handling

  • 按腐蚀品/一般化学品管理;泄漏用砂土/惰性材料收容

Manage as corrosive/general chemical; contain spills with sand/inert material

  1. 安全信息 / Safety Information

GHS 分类 GHS Classification

GHS05(腐蚀)/ GHS07;皮肤/眼损伤 / GHS05/GHS07; skin/eye damage

危害声明 H-statements

H314 造成严重皮肤灼伤和眼损伤(高浓度);H318 造成严重眼损伤 / H314/H318 (conc.); H315/H319 (dilute)

防范说明 P-statements

P260, P280, P303+P361+P353, P305+P351+P338, P310

NFPA 704

健康 Health 2 / 易燃 Flammability 1 / 反应 Reactivity 0

急性毒性 Acute Toxicity

低毒:LD₅₀(大鼠,经口) ≈ 3543 mg/kg;高浓度具腐蚀性 / Low toxicity; corrosive when concentrated

危险反应 Hazardous Reaction

与强碱中和放热;与强氧化剂反应;高温分解 / Exothermic neutralization with bases; reacts with oxidizers

灭火 Fire-fighting

可燃液体;用雾状水、干粉、CO₂灭火;注意防飞溅 / Combustible liquid; water spray, powder, CO₂


  1. 包装 / Packaging

25 kg / 200 kg / 250 kg 塑料桶;IBC 吨桶、槽车可定制。 25/200/250 kg plastic drums; IBC/tank truck on request.

  1. 保质期 / Shelf Life

在原包装、密封阴凉条件下 24 个月。 24 months in original sealed, cool storage.

  1. 法规与合规 / Regulatory & Compliance
  • 工业用途按腐蚀性/一般化学品管理;出口欧盟须满足进口方 REACH 义务(EC 200-018-0)

Industrial use as corrosive/general chemical; EU exports subject to REACH (EC 200-018-0)

  • 食品级须符合 GB 1886.173-2016 / FCC / E 270 并取得 HALAL/KOSHER 资质

Food grade must comply with GB 1886.173-2016 / FCC / E 270 and hold HALAL/KOSHER

  • 高浓度溶液运输可能按 UN3265(8类腐蚀性液体)管理,具体请以最新 SDS / IATA / IMDG 为准

Concentrated solution transport may be Class 8 corrosive (UN3265); per latest SDS / IATA / IMDG

 

免责声明 / Disclaimer:本技术数据表仅供参考,不构成任何担保。数据基于编制时可得的公开信息,重庆广益化工有限公司不对因使用本表所产生的任何后果承担责任。实际技术参数请以每批次出厂 COA 为准。 This TDS is for reference only and does not constitute a warranty. Values per batch COA prevail.

© 2026 Chongqing Guangyi Chemical Co., Ltd.