7138-34-3

• 常用中文名：4-氯扁桃酸
• 常用英文名：4-Chloromandelic acid
• CAS号：7138-34-3
• 分子式：C₈H₇ClO₃
• 分子量：186.59200
• 发布时间：2018-02-23 08:00:00
• 更新时间：2024-01-09 08:43:13

• 用于测定锆的沉淀剂。

名称

• 中文名: 4-氯扁桃酸
• 英文名: 4-Chloromandelic acid
• 中文别名: 4-氯-DL-扁桃酸; 对氯扁桃酸; 2-(4-氯苯基)-2-羟基乙酸
• 英文别名: 2-(4'-chlorophenyl)-2-hydroxyethanoic acid; Chloromandelicacid; P-CHLORO-DL-MANDELIC ACID; p-chloromandelic acid; EINECS 207-764-6; (4-CHLOROPHENYL)(HYDROXY)ACETIC ACID; MFCD00042724; DL-(p-Chlorophenyl)glycolic acid; DL-P-CHLORO MANDELIC ACID

物化性质

• 熔点: 114-118 °C
• 分子式: C₈H₇ClO₃
• 分子量: 186.59200
• 精确质量: 186.00800
• PSA: 57.53000
• LogP: 1.45800
• 储存条件:

  密封于阴凉干燥处。

• 稳定性:

  遵照规格使用和储存则不会分解。

• 分子结构:

  1、 摩尔折射率：43.79

  2、 摩尔体积（m³/mol）：127.0

  3、 等张比容（90.2K）：356.9

  4、 表面张力（dyne/cm）：62.2

  5 、 极化率（ 10 ^-24cm ³ ）： 17.36
• 计算化学:

  1、 疏水参数计算参考值（XlogP）：1.2

  2、 氢键供体数量：2

  3、 氢键受体数量：3

  4、 可旋转化学键数量：2

  5、 拓扑分子极性表面积（TPSA）：57.5

  6、 重原子数量：12

  7、 表面电荷：0

  8、 复杂度：164

  9、 同位素原子数量：0

  10、 确定原子立构中心数量：0

  11、 不确定原子立构中心数量：1

  12、 确定化学键立构中心数量：0

  13、 不确定化学键立构中心数量：0

  14、 共价键单元数量：1

• 更多:

  1. 性状：白色针状结晶。

  2. 密度（g/mL,25/4℃）： 无可用

  3. 相对蒸汽密度（g/mL,空气=1）：无可用

  4. 熔点（ºC）：119-122

  5. 沸点（ºC,常压）：无可用

  6. 沸点（ºC,5.2kPa）： 无可用

  7. 折射率： 无可用

  8. 闪点（ºC）： 无可用

  9. 比旋光度（º）：无可用

  10. 自燃点或引燃温度（ºC）：无可用

  11. 蒸气压（kPa,25ºC）：无可用

  12. 饱和蒸气压（kPa,60ºC）：无可用

  13. 燃烧热（KJ/mol）：无可用

  14. 临界温度（ºC）：无可用

  15. 临界压力（KPa）：无可用

  16. 油水（辛醇/水）分配系数的对数值：无可用

  17. 爆炸上限（%,V/V）：无可用

  18. 爆炸下限（%,V/V）： 无可用

  19. 溶解性：溶于乙醇、乙醚和热苯，略溶于水，微溶于冷苯和二硫化碳。

MSDS

4-Chloro-DL-mandelic Acid Revision number: 1 SAFETY DATA SHEET Section1. BASE INFORMATION Product name:4-Chloro-DL-mandelic Acid Revision number:1 Section2. HAZARDS IDENTIFICATION Classification of the GHS PHYSICAL HAZARDSNot classified HEALTH HAZARDS Category 2 Skin corrosion/irritation Serious eye damage/eye irritationCategory 2A Not classified ENVIRONMENTAL HAZARDS GHS label elements Pictograms or hazard symbols Signal wordWarning Hazard statementCauses skin irritation Causes serious eye irritation Precautionary statements [Prevention]Wash hands thoroughly after handling. Wear protective gloves/eye protection/face protection. [Response]IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention. IF ON SKIN: Gently wash with plenty of soap and water. If skin irritation occurs: Get medical advice/attention. Take off contaminated clothing and wash before reuse. Section3. COMPOSITION/INFORMATION ON INGREDIENTS Substance/mixture:Substance Component(s):4-Chloro-DL-mandelic Acid Percent:>98.0%(T) CAS Number:7138-34-3 Chemical Formula:C8H7ClO3 Section4. FIRST AID MEASURES Inhalation:Remove victim to fresh air and keep at rest in a position comfortable for breathing. Get medical advice/attention if you feel unwell. Skin contact:Remove/Take off immediately all contaminated clothing. Gently wash with plenty of soap and water. If skin irritation or rash occurs: Get medical advice/attention. 4-Chloro-DL-mandelic Acid Section4. FIRST AID MEASURES Eye contact:Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention. Ingestion:Get medical advice/attention if you feel unwell. Rinse mouth. Protection of first-aiders:A rescuer should wear personal protective equipment, such as rubber gloves and air- tight goggles. Section5. FIRE-FIGHTING MEASURES Dry chemical, foam, water spray, carbon dioxide. Suitable extinguishing media: Specific hazards:Take care as it may decompose upon combustion or in high temperatures to generate poisonous fume. Specific methods:Fire-extinguishing work is done from the windward and the suitable fire-extinguishing method according to the surrounding situation is used. Uninvolved persons should evacuate to a safe place. In case of fire in the surroundings: Remove movable containers if safe to do so. Special protectiveWhen extinguishing fire, be sure to wear personal protective equipment. equipment for firefighters: Section6. ACCIDENTAL RELEASE MEASURES Personal precautions,Use personal protective equipment. Keep people away from and upwind of spill/leak. protective equipment and Entry to non-involved personnel should be controlled around the leakage area by emergency procedures: roping off, etc. Environmental precautions: Prevent product from entering drains. Methods and materials for Sweep dust to collect it into an airtight container, taking care not to disperse it. containment and cleaning Adhered or collected material should be promptly disposed of, in accordance with up: appropriate laws and regulations. Section7. HANDLING AND STORAGE Handling Technical measures:Handling is performed in a well ventilated place. Wear suitable protective equipment. Prevent dispersion of dust. Wash hands and face thoroughly after handling. Use a local exhaust if dust or aerosol will be generated. Advice on safe handling:Avoid contact with skin, eyes and clothing. Storage Keep container tightly closed. Store in a cool and dark place. Storage conditions: Store away from incompatible materials such as oxidizing agents. Law is followed. Packaging material: Section8. EXPOSURE CONTROLS / PERSONAL PROTECTION Engineering controls:Install a closed system or local exhaust as possible so that workers should not be exposed directly. Also install safety shower and eye bath. Personal protective equipment Respiratory protection: Dust respirator. Follow local and national regulations. Hand protection:Protective gloves. Eye protection:Safety glasses. A face-shield, if the situation requires. Skin and body protection: Protective clothing. Protective boots, if the situation requires. Section9. PHYSICAL AND CHEMICAL PROPERTIES Physical state (20°C):Solid Form:crystal - powder Color:White - Almost white Odor:No data available pH: No data available Melting point/freezing point:120 °C Boiling Point/Range:No data available 4-Chloro-DL-mandelic Acid Section9. PHYSICAL AND CHEMICAL PROPERTIES Flash Point:No data available Explosive limits Lower:No data available No data available Upper: Density:No data available No data available Solubility: Section10. STABILITY AND REACTIVITY Stability:Stable under proper conditions. Reactivity:No special reactivity has been reported. Incompartible materials: oxidizing agents Hazardous Decomposition Carbon monoxide, Carbon dioxide, Hydrogen chloride Products: Section11. TOXICOLOGICAL INFORMATION Acute Toxicity:No data available Skin corrosion/irritation: No data available Serious eyeNo data available damage/irritation: Germ cell mutagenicity: No data available Carcinogenicity: IARC =No data available No data available NTP = Reproductive toxicity:No data available Section12. ECOLOGICAL INFORMATION Ecotoxicity: Fish:No data available Crustacea:No data available Algae:No data available Persistence / degradability: No data available BioaccumulativeNo data available potential(BCF): Mobillity in soil log Pow:No data available Soil adsorption (Koc):No data available Henry's LawNo data available constant(PaM3/mol): Section13. DISPOSAL CONSIDERATIONS Recycle to process, if possible. Consult your local regional authorities. You may be able to dissolve or mix material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber system. Observe all federal, state and local regulations when disposing of the substance. Section14. TRANSPORT INFORMATION Hazards Class:Does not correspond to the classification standard of the United Nations UN-No:Not Listed Section15. REGULATORY INFORMATION Safe management ordinance of dangerous chemical product (State Council announces on January 26, 2002): Safe use and production, the storage of a dangerous chemical, transport, loading and unloading were prescribed. 4-Chloro-DL-mandelic Acid SECTION 16 - ADDITIONAL INFORMATION N/A

毒性和生态

生态学数据: 该物质对环境可能有危害，对水体应给予特别注意。

安全

• 危害码 (欧洲): Xn
• 风险声明 (欧洲): 36/37/38-22
• 安全声明 (欧洲): S22-S24/25
• WGK德国: 3

合成路线

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制备

由氯苯与乙酐反应制得对氯苯乙酮，再经溴化；水解；酸化而得。将氯苯；二硫化碳；无水三氯化铝混合后，在搅拌下滴加乙酐，回流2h，回收二硫化碳，倒入冰冷的稀盐酸中提取苯层。依次用水；10%氢氧化钠水洗，干燥，减压蒸馏得4-氯苯乙酮。然后在36 -40 ℃ 滴加溴素，再经水洗；亚硫酸氢钠洗，水洗后放置得4-ω,ω'-二溴苯乙酮结晶。加氢氧化钠液水解，最后用盐酸中和至强酸性，经乙醚提取；干燥，以苯结晶即得成品。