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95-48-7

95-48-7结构式
95-48-7结构式

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中文名 2-甲酚
英文名 o-cresol
中文别名 2-甲基酚
邻蒸木油酸
2-甲基苯酚
邻克勒梭尔
邻甲酚
邻甲基苯酚
邻甲苯酚
O-甲酚
甲酚皂
英文别名 hydroxytoluene
Cresol, o-
tekresol
Phenol,2-methyl-
Cresol, ortho-
2-hydroxytoluene
o-CRESOL pure
2-methyl-phenol
EINECS 202-423-8
Phenol, 2-methyl-
bacillol
m-cresol,p-cresol,mixture of
MFCD00002226
o-Methylphenol
ortho-cresol
o-Cresol
kresolen
2-hydroxy-toluene
(o-methyl)phenol
o-Hydroxytoluene
Cresol, o-isomer
p-cresol,m-cresol,mixture of
o-toluol
2-hydroxy-1-methylbenzene
2-hydroxyphenylmethane
ORTHO CRESO
o-Cresol [UN2076] [Poison, Corrosive]
FEMA 3480
2-cresol
o-Oxytoluene
Orthocresol
TRICRESOL
krezol
cresylic acid
Cresylol
cresoli
Monomethyl phenol
kresole
o-Kresol
密度 1.0±0.1 g/cm3
沸点 191.0±0.0 °C at 760 mmHg
熔点 30-32ºC
分子式 C7H8O
分子量 108.138
闪点 81.1±0.0 °C
精确质量 108.057518
PSA 20.23000
LogP 1.94
外观性状 透明至略琥珀色液体
蒸汽密度 3.72 (vs air)
蒸汽压 0.4±0.3 mmHg at 25°C
折射率 1.546
储存条件

储存注意事项储存于阴凉、通风的库房。远离火种、热源。包装要求密封,不可与空气接触。应与氧化剂、碱类、食用化学品分开存放,切忌混储。配备相应品种和数量的消防器材。储区应备有合适的材料收容泄漏物。

稳定性

1.遇明火、高热或氧化剂能引起燃烧。有弱酸性,与氢氧化钠作用生成可溶性的钠盐,但不与碳酸钠作用。邻甲酚钠盐与硫酸二甲酯一类的烷基化剂反应,生成酚醚。与醛类反应得到合成树脂。催化加氢生成甲基环己醇。在温和条件下,邻甲酚即可进行硝化、卤化、烷基化和磺化反应。邻甲酚容易氧化,与光和空气接触颜色即变深,生成醌类及其他复杂的化合物。

2.有毒。主要作用于中枢神经,严重时甚至致死。甲酚蒸气或者烟雾可损伤皮肤,吸入时,能引起慢性肾炎和神经障碍。工作场所空气中最高容许浓度为5*10-6。大鼠经口LD501350mg/kg。生产设备应密闭,操作人员应配备防护用具。

3.稳定性 稳定

4.禁配物 强氧化剂、碱类

5.避免接触的条件 光照

6.聚合危害 不聚合

水溶解性 20 g/L (20 ºC)
分子结构

1、摩尔折射率:32.95

2、摩尔体积(cm3/mol):104.1

3、等张比容(90.2K):259.9

4、表面张力(dyne/cm):38.8

5、极化率(10-24cm3):13.06

计算化学

1.疏水参数计算参考值(XlogP):无

2.氢键供体数量:1

3.氢键受体数量:1

4.可旋转化学键数量:0

5.互变异构体数量:3

6.拓扑分子极性表面积20.2

7.重原子数量:8

8.表面电荷:0

9.复杂度:70.8

10.同位素原子数量:0

11.确定原子立构中心数量:0

12.不确定原子立构中心数量:0

13.确定化学键立构中心数量:0

14.不确定化学键立构中心数量:0

15.共价键单元数量:1

更多

1.性状:白色结晶,有芳香气味。

2.熔点(℃):29.8~31

3.沸点(℃):191~192

4.相对密度(水=1):1.05

5.相对蒸气密度(空气=1):3.72

6.饱和蒸气压(kPa):0.133(38.2℃)

7.燃烧热(kJ/mol):-3689.8

8.临界温度(℃):424.5

9.临界压力(MPa):5.01

10.辛醇/水分配系数:1.95

11.闪点(℃):81(CC)

12.引燃温度(℃):598

13.爆炸上限(%):7.6

14.爆炸下限(%):1.4(148℃)

15.溶解性:微溶于水,溶于乙醇、乙醚、氯仿等。

16.黏度(mPa·s,20ºC):9.56

17.蒸发热(KJ/mol,b.p.):415.0

18.比热容(KJ/(kg·K),定压):2.09

19.电导率(S/m,25ºC):0.127×10-8

20.溶解度(%,25ºC,水):2.2

21.常温折射率(n25):1.5399

22.相对密度(25℃,4℃):1.03535

23.偏心因子:0.434

24.气相标准燃烧热(焓)(kJ·mol-1):-3769.32

25.气相标准声称热(焓)( kJ·mol-1) :-128.57

26.气相标准熵(J·mol-1·K-1) :352.70

27.气相标准生成自由能( kJ·mol-1):-34.3

28.气相标准热熔(J·mol-1·K-1):127.30

29.晶相相标准燃烧热(焓)(kJ·mol-1):-3693.30

30.晶相标准声称热(焓)( kJ·mol-1):-204.60

31.晶相标准熵(J·mol-1·K-1) :165.44

32.晶相标准生成自由能( kJ·mol-1):-55.69

33.晶相标准热熔(J·mol-1·K-1):154.56

国标编号: 61073
CAS: 95-48-7
中文名称: 2-甲(苯)酚
英文名称: 2-methylphenol;o-Cresol
别 名: 邻甲(苯)酚
分子式: C7H8O;HOC6H4CH3
分子量: 108.13
熔 点: 30.8℃ 沸点:190.8℃
密 度: 相对密度(水=1)1.05;
蒸汽压: 81℃
溶解性: 微溶于水,溶于乙醇、乙醚、氯仿等
稳定性: 稳定
外观与性状: 白色结晶,有芳香气味
危险标记: 14(有毒品)
用 途: 用作分析试剂并用于有机合成

2.对环境的影响:
一、健康危害
侵入途径:吸入、食入、经皮吸收。
健康危害:本品对皮肤、粘膜有强烈刺激和腐蚀作用。引起多脏器损害。
急性中毒:引起肌肉无力、胃肠道症状、中枢神经抑制、虚脱、体温下降和昏迷,并可引起肺水肿和肝、肾、胰等脏器损害,最终发生呼吸衰竭。
慢性影响:可引起消化道功能障碍,肝、肾损害和皮疹。
二、毒理学资料及环境行为
毒性:属低毒类。
急性毒性:LD 50121mg/kg(大鼠经口);890mg/kg(兔经皮)
刺激性:家兔经皮:12500μg(24小时),轻度刺激。家兔经眼:100mg,轻度刺激。
致癌性:小鼠经皮最低中毒剂量(TDL 0):4800mg/kg(12周,间歇),致肿瘤阳性。
对生物降解的影响:水中浓度11~16mg/L时,活性污泥对氨氮的硝化作用降低75%,浓度50mg/L时,荧光假单孢菌对葡萄糖的降解受到抑制,浓度600mg/L时,大肠杆菌对葡萄糖的降解受到抑制。
危险特性:遇明火、高热或与氧化剂接触,有引起燃烧爆炸的危险。具有腐蚀性。
燃烧(分解)产物:一氧化碳、二氧化碳。

3.现场应急监测方法:

4.实验室监测方法:
监测方法 来源 类别
气相色谱法 《空气和废气监测分析方法》国家环保局编 空气和废气
气相色谱法;色谱/质谱法 《固体废弃物试验分析评价手册》中国环境监测总站等译 固体废弃物
高效液相色谱法 《空气中有害物的测定方法》(第二版),杭士平主编 空气
氯亚胺二溴苯醌比色法 《化工企业空气中有害物质测定方法》,化学工业出版社 化工企业空气

5.环境标准:
中国(TJ36-79) 车间空气中有害物质的最高容许浓度 5mg/m3
前苏联(1978) 环境空气中基本安全浓度 28μg/m3
前苏联(1975) 水体中有害物质最高允许浓度 0.05mg/L
前苏联(1978) 渔业水中最高允许浓度 3μg/L
前苏联(1975) 污水排放标准 0.1mg/L
  嗅觉阈浓度 0.00068ppm

6.应急处理处置方法:
一、泄漏应急处理
隔离泄漏污染区,限制出入。切断火源。建议应急处理人员戴自给式呼吸器,穿防毒服。不要直接接触泄漏物。小量泄漏:避免扬尘,用洁净的铲子收集于干燥、洁净、有盖的容器中。大量泄漏:收集回收或运至废物处理场所处置。
废弃物处置方法:用焚烧法。
二、防护措施
呼吸系统防护:空气中粉尘浓度超标时,应该佩戴头罩型电动送风过滤式防尘呼吸器;可能接触其蒸气时,应该佩戴自吸过滤式防毒面具(全面罩)。
眼睛防护:呼吸系统防护中已作防护。
身体防护:穿胶布防毒衣。
手防护:戴橡胶手套。
其它:工作现场禁止吸烟、进食和饮水。工作毕,彻底清洗。单独存放被毒物污染的衣服,洗后备用。注意个人清洁卫生。
三、急救措施
皮肤接触:立即脱去被污染的衣着,用甘油、聚乙烯乙二醇或聚乙烯乙二醇和酒精混合液(7 3)抹洗,然后用水彻底清洗。或用大量流动清水冲洗,至少15分钟。就医。
眼睛接触:立即提起眼睑,用大量流动清水或生理盐水彻底冲洗至少15分钟。就医。
吸入:迅速脱离现场至空气新鲜处。保持呼吸道通畅。如呼吸困难,给输氧。如呼吸停止,立即进行人工呼吸。就医。
食入:立即给饮植物油15-30mL。催吐。就医。

灭火方法:消防人员须佩戴防毒面具、穿全身消防服。灭火剂:雾状水、泡沫、干粉、二氧化碳、砂土。

毒理学数据:

1、急性毒性:大鼠经口LD50:121mg/kg;小鼠经口LC50:344mg/kg;大鼠吸入LDL0:940mg/kg;兔子经皮LD50:890mg/kg;大鼠经皮LD50:620mg/kg;大鼠吸入LD50:>1220mg/m3/1H;

2、对皮肤、黏膜有强烈刺激作用和腐蚀作用。嗅觉阈浓度7.956×10-4mg/m3,工作场所最高容许浓度22mg/m3(美国)。

3.急性毒性

LD50:121mg/kg(大鼠经口);890mg/kg(兔经皮)

LC50:29mg/m3(大鼠吸入)

4.刺激性

家兔经皮:524mg(24h),重度刺激。

家兔经眼:105mg,重度刺激。

5.亚急性与慢性毒性 动物喂饲甲酚对胃肠道有刺激、腐蚀作用,可引起胃肠道出血、肾小管损害、局灶性肺炎及肺充血和肝细胞坏死。

6.致突变性 姐妹染色单体交换:人成纤维细胞8mmol/L

生态学数据:

1.生态毒性

LC50:18~20.8mg/L(96h)(鱼类)

IC50:6.8~33mg/L(72h)(藻类)

2.生物降解性

好氧生物降解(h):24~168

厌氧生物降解(h):96~672

3.非生物降解性

水相光解半衰期(h):214~282

水中光氧化半衰期(h):66~3480

空气中光氧化半衰期(h):1.6~16

CHEMICAL IDENTIFICATION

RTECS NUMBER :
GO6300000
CHEMICAL NAME :
o-Cresol
CAS REGISTRY NUMBER :
95-48-7
LAST UPDATED :
199712
DATA ITEMS CITED :
48
MOLECULAR FORMULA :
C7-H8-O
MOLECULAR WEIGHT :
108.15
WISWESSER LINE NOTATION :
QR B1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
Standard Draize test
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
TYPE OF TEST :
Standard Draize test
ROUTE OF EXPOSURE :
Administration into the eye
SPECIES OBSERVED :
Rodent - rabbit
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
121 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold Lungs, Thorax, or Respiration - dyspnea Gastrointestinal - ulceration or bleeding from stomach
TYPE OF TEST :
LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
>1220 mg/m3/1H
TOXIC EFFECTS :
Sense Organs and Special Senses (Eye) - lacrimation Behavioral - somnolence (general depressed activity)
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
620 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
65 mg/kg
TOXIC EFFECTS :
Sense Organs and Special Senses (Eye) - miosis (pupillary constriction) Behavioral - excitement Lungs, Thorax, or Respiration - acute pulmonary edema
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
344 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
179 mg/m3/2H
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
200 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
410 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Mammal - dog
DOSE/DURATION :
80 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Mammal - cat
DOSE/DURATION :
55 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
940 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
890 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
450 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
180 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - guinea pig
DOSE/DURATION :
720 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - guinea pig
DOSE/DURATION :
35 mg/kg
TOXIC EFFECTS :
Sense Organs and Special Senses (Eye) - miosis (pupillary constriction) Behavioral - excitement Lungs, Thorax, or Respiration - acute pulmonary edema
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Amphibian - frog
DOSE/DURATION :
200 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
21 gm/kg/28D-C
TOXIC EFFECTS :
Liver - changes in liver weight Kidney, Ureter, Bladder - changes in bladder weight
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
82 gm/kg/13W-C
TOXIC EFFECTS :
Liver - changes in liver weight Kidney, Ureter, Bladder - changes in bladder weight Endocrine - changes in thymus weight
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
101 gm/kg/28D-C
TOXIC EFFECTS :
Brain and Coverings - changes in brain weight Liver - changes in liver weight Nutritional and Gross Metabolic - weight loss or decreased weight gain
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
218 gm/kg/13W-C
TOXIC EFFECTS :
Brain and Coverings - changes in brain weight Endocrine - changes in thymus weight Related to Chronic Data - changes in testicular weight
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Mammal - species unspecified
DOSE/DURATION :
1169 mg/kg/28D-C
TOXIC EFFECTS :
Liver - changes in liver weight
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
4800 mg/kg/12W-I
TOXIC EFFECTS :
Tumorigenic - neoplastic by RTECS criteria Skin and Appendages - tumors

MUTATION DATA

TYPE OF TEST :
Sister chromatid exchange
TEST SYSTEM :
Human Fibroblast
REFERENCE :
MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 137,51,1984 *** REVIEWS *** ACGIH TLV-TWA 22 mg/m3 (5 ppm) (skin) DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 TOXICOLOGY REVIEW MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 47,75,1978 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD-air:TWA 5 ppm (22 mg/m3) DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: 3,61,1971 OSHA PEL (Gen Indu):8H TWA 5 ppm (22 mg/m3) (skin) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 5 ppm (22 mg/m3) (skin) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 5 ppm (22 mg/m3) (skin) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):8H TWA 5 ppm (22 mg/m3) (skin) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-DENMARK:TWA 5 ppm (22 mg/m3);Skin JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO o-CRESOL-air:10H TWA 2.3 ppm REFERENCE : NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda. Volume(issue)/page/year: DHHS #92-100,1992 NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 84364 No. of Facilities: 1724 (estimated) No. of Industries: 26 No. of Occupations: 28 No. of Employees: 14550 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 84364 No. of Facilities: 1707 (estimated) No. of Industries: 16 No. of Occupations: 24 No. of Employees: 10985 (estimated) No. of Female Employees: 483 (estimated)

符号 GHS05 GHS06 GHS09
GHS05, GHS06, GHS09
信号词 Danger
危害声明 H301 + H311-H314-H411
警示性声明 P273-P280-P301 + P310 + P330-P303 + P361 + P353-P304 + P340 + P310-P305 + P351 + P338
个人防护装备 Eyeshields;Faceshields;full-face particle respirator type N100 (US);Gloves;respirator cartridge type N100 (US);type P1 (EN143) respirator filter;type P3 (EN 143) respirator cartridges
危害码 (欧洲) T:Toxic
风险声明 (欧洲) R24/25;R34
安全声明 (欧洲) S36/37/39-S45
危险品运输编码 UN 2076/3455
WGK德国 1
RTECS号 GO6300000
包装等级 II
危险类别 6.1
海关编码 29071200

从煤焦化所得的酚油中切取的甲酚馏分含邻甲酚6%,间甲酚49.4%,对甲酚32.1%,还含二甲酚及少量苯酚。邻甲酚沸点比间、对甲酚低10℃,有可能利用一般蒸馏塔将其分离。将粗酚蒸馏切取的邻甲酚馏分在不低于40块理论塔板的精馏柱内蒸馏,回流比采取14-15:1,切取馏程为188-192℃,获得的精邻甲酚熔点约29℃,纯度大于97%。合成法主要有以下几种:

1. 苯酚烷基化法 以苯酚、甲醇为原料,在约4.14MPa表压下及三氧化二铝催化剂存在下进行甲基化而得。

95-48-7 preparation

2. 邻甲苯胺法 该法用于试剂生产,由邻甲苯胺重氮化、水解而得。

3. 甲苯羟基化法

95-48-7 preparation

4.将邻甲苯胺加入硫酸溶液中,搅拌冷却后得到邻甲苯胺硫酸盐,加入冰块降温至0~5℃,维持此温度范围,边搅拌边缓慢加入饱和的亚硝酸钠溶液至淀粉-碘化钾试纸不褪色为反应终点。所得重氮盐加入浓硫酸充分搅拌均匀,停止搅拌,待反应物激烈反应后再通入蒸汽加热至完全水解。静置分层,取下层油状物,加入5%氢氧化钠,滤去不溶性杂质,然后用25%的硫酸中和至ph值为。静置分层,取油层,用水洗涤2次,所得粗品采用减压蒸馏,于1333Pa收集74~75.5℃馏分,即得成品。过程反应式为:

95-48-7 preparation

海关编码 2907121200
中文概述 2907121200 邻甲酚。监管条件:无。增值税率:17.0%。退税率:9.0%。最低关税:5.5%。普通关税:30.0%
申报要素 品名, 成分含量, 用途
Summary 2907121200 o-cresol。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。Lowest tariff:5.5%。General tariff:30.0%