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抗氧剂BHT

抗氧剂BHT用途

Butylated hydroxytoluene 是一种抗氧化剂,广泛用于食品和食品相关产品中。Butylated hydroxytoluene 是铁死亡 (Ferroptosis) 抑制剂。

抗氧剂BHT名称

[ CAS 号 ]:
128-37-0

[ 中文名 ]:
2,6-二叔丁基-4-甲基苯酚

[ 英文名 ]:
Butylated hydroxytoluene

[中文别名 ]:

[英文别名 ]:

2,6-Di-tert-butyl-4-methylphenol
EINECS 204-881-4
3,5-Di-tert-butyl-4-hydroxytoluene
MFCD00011644
2,6-Di-tert-butyl-p-cresol
4-hydroxy-3,5-di-tert-butylphenylacetic acid
3,5-di-t-butyl-4-hydroxyphenyl-acetic acid
Butylated hydroxytoluene
2,6-di-tert-butyl-4-methyl-phenol
Naugard BHT

抗氧剂BHT生物活性

[ 描述 ]:

Butylated hydroxytoluene 是一种抗氧化剂,广泛用于食品和食品相关产品中。Butylated hydroxytoluene 是铁死亡 (Ferroptosis) 抑制剂。

[ 相关类别 ]:

研究领域 >> 癌症

信号通路 >> 细胞凋亡 >> Ferroptosis

[体内研究]

丁羟甲苯(BHT)是致癌物诱发小鼠肺癌的有效促进剂。丁基羟基甲苯(口服；400 mg/kg；每周)增加7周龄rasH2小鼠对肺癌的易感性[3]

[参考文献]

[1]. Babich H, et al. Butylated hydroxytoluene (BHT): a review. Environ Res. 1982 Oct;29(1):1-29.

[2]. Stockwell BR, et al. Ferroptosis: A Regulated Cell Death Nexus Linking Metabolism, Redox Biology, and Disease. ell. 2017 Oct 5;171(2):273-285.

[3]. Umemura T, et al. Butylhydroxytoluene (BHT) increases susceptibility of transgenic rasH2 mice to lung carcinogenesis. J Cancer Res Clin Oncol. 2001 Oct;127(10):583-90.

抗氧剂BHT物理化学性质

[ 密度 ]:
1.048

[ 沸点 ]:
265 ºC

[ 熔点 ]:
69-71 ºC

[ 分子式 ]:
C₁₅H₂₄O

[ 分子量 ]:
220.350

[ 闪点 ]:
127 ºC

[ 精确质量 ]:
220.182709

[ PSA ]:
20.23000

[ LogP ]:
5.32

[ 外观性状 ]:
白色晶体或结晶粉末

[ 蒸汽密度 ]:
7.6 (vs air)

[ 蒸汽压 ]:
0.0±0.6 mmHg at 25°C

[ 折射率 ]:
1.499

[ 储存条件 ]:
库房通风低温干燥,与氧化剂分开存放

[ 稳定性 ]:
Stable, but light-sensitive. Incompatible with acid chlorides, acid anhydrides, brass, copper, copper alloys, steel, bases, oxidizing agents. Combustible.

[ 水溶解性 ]:
insoluble

抗氧剂BHTMSDS

抗氧剂BHT毒性和生态

CHEMICAL IDENTIFICATION

RTECS NUMBER :: GO7875000

CHEMICAL NAME :: p-Cresol, 2,6-di-tert-butyl-

CAS REGISTRY NUMBER :: 128-37-0

LAST UPDATED :: 199712

DATA ITEMS CITED :: 79

MOLECULAR FORMULA :: C15-H24-O

MOLECULAR WEIGHT :: 220.39

WISWESSER LINE NOTATION :: 1X1&1&R BQ E1 CX1&1&1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: Standard Draize test

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Human

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 :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Human - woman

DOSE/DURATION :: 80 mg/kg

TOXIC EFFECTS :: Behavioral - coma Gastrointestinal - gastritis Gastrointestinal - nausea or vomiting

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 890 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 :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 650 mg/kg

TOXIC EFFECTS :: Behavioral - tremor Lungs, Thorax, or Respiration - chronic pulmonary edema

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 138 mg/kg

TOXIC EFFECTS :: Lungs, Thorax, or Respiration - chronic pulmonary edema Lungs, Thorax, or Respiration - other changes Blood - hemorrhage

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 180 mg/kg

TOXIC EFFECTS :: Behavioral - sleep

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Mammal - cat

DOSE/DURATION :: 940 mg/kg

TOXIC EFFECTS :: Gastrointestinal - hypermotility, diarrhea Behavioral - tremor Lungs, Thorax, or Respiration - respiratory depression

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 2100 mg/kg

TOXIC EFFECTS :: Gastrointestinal - hypermotility, diarrhea Behavioral - tremor Lungs, Thorax, or Respiration - respiratory depression

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 10700 mg/kg

TOXIC EFFECTS :: Gastrointestinal - hypermotility, diarrhea Behavioral - tremor Lungs, Thorax, or Respiration - respiratory depression

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 109 gm/kg/2Y-C

TOXIC EFFECTS :: Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol) Blood - changes in erythrocyte (RBC) count Blood - changes in leukocyte (WBC) count

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 27 gm/kg/90D-C

TOXIC EFFECTS :: Liver - changes in liver weight Endocrine - evidence of thyroid hyperfunction Endocrine - changes in thyroid weight

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 37800 mg/kg/6W-C

TOXIC EFFECTS :: Liver - changes in liver weight Endocrine - changes in adrenal 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 - rat

DOSE/DURATION :: 5600 mg/kg/16W-C

TOXIC EFFECTS :: Liver - changes in liver weight Kidney, Ureter, Bladder - other changes in urine composition

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 275 mg/kg/26W-C

TOXIC EFFECTS :: Liver - changes in liver weight Skin and Appendages - hair 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 - rat

DOSE/DURATION :: 112 gm/kg/80W-C

TOXIC EFFECTS :: Liver - changes in liver weight Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - hepatic microsomal mixed oxidase (dealkylation, hydroxylation, etc.) Biochemical - Metabolism (Intermediary) - other proteins

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 5040 mg/kg/7D-C

TOXIC EFFECTS :: Liver - changes in liver weight Blood - changes in erythrocyte (RBC) count Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - transaminases

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 13500 mg/kg/18D-I

TOXIC EFFECTS :: Liver - changes in liver weight Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - other Enzymes

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 48600 mg/kg/30D-C

TOXIC EFFECTS :: Lungs, Thorax, or Respiration - changes in lung weight Liver - changes in liver weight Kidney, Ureter, Bladder - changes in tubules (including acute renal failure, acute tubular necrosis)

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 5 gm/kg/4W-I

TOXIC EFFECTS :: Lungs, Thorax, or Respiration - changes in lung weight Related to Chronic Data - death

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Primate - monkey

DOSE/DURATION :: 14 gm/kg/4W-I

TOXIC EFFECTS :: Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - phosphatases

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - hamster

DOSE/DURATION :: 1596 mg/kg/14D-C

TOXIC EFFECTS :: Liver - changes in liver weight Nutritional and Gross Metabolic - weight loss or decreased weight gain Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - other transferases

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 134 gm/kg/32W-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Kidney, Ureter, Bladder - tumors Tumorigenic - cells (cultured) transformed

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 435 mg/kg/69W-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Lungs, Thorax, or Respiration - tumors Gastrointestinal - tumors

TYPE OF TEST :: TD - Toxic dose (other than lowest)

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 247 gm/kg/3Y-C

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Reproductive - Tumorigenic effects - transplacental tumorigenesis Liver - tumors

TYPE OF TEST :: TD - Toxic dose (other than lowest)

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 247 gm/kg/3Y-C

TOXIC EFFECTS :: Tumorigenic - neoplastic by RTECS criteria Reproductive - Tumorigenic effects - ovarian tumors

TYPE OF TEST :: TD - Toxic dose (other than lowest)

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 1423 mg/kg/43W-C

TOXIC EFFECTS :: Tumorigenic - neoplastic by RTECS criteria Liver - tumors

TYPE OF TEST :: TD - Toxic dose (other than lowest)

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 247 gm/kg

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Liver - tumors

TYPE OF TEST :: TD - Toxic dose (other than lowest)

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 963 gm/kg

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Gastrointestinal - tumors

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 6 gm/kg

SEX/DURATION :: male 13 week(s) pre-mating female 13 week(s) pre-mating - 3 week(s) post-birth

TOXIC EFFECTS :: Reproductive - Effects on Newborn - growth statistics (e.g.%, reduced weight gain)

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 18 gm/kg

SEX/DURATION :: male 2 week(s) pre-mating female 2 week(s) pre-mating - 3 week(s) post-birth

TOXIC EFFECTS :: Reproductive - Effects on Newborn - growth statistics (e.g.%, reduced weight gain) Reproductive - Effects on Newborn - behavioral

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 9 gm/kg

SEX/DURATION :: male 2 week(s) pre-mating female 2 week(s) pre-mating - 3 week(s) post-birth

TOXIC EFFECTS :: Reproductive - Effects on Newborn - weaning or lactation index (e.g., # alive at weaning per # alive at day 4)

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 35 gm/kg

SEX/DURATION :: male 10 week(s) pre-mating

TOXIC EFFECTS :: Reproductive - Fertility - pre-implantation mortality (e.g. reduction in number of implants per female; total number of implants per corpora lutea)

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 43800 mg/kg

SEX/DURATION :: female 52 day(s) pre-mating female 1-21 day(s) after conception

TOXIC EFFECTS :: Reproductive - Maternal Effects - parturition Reproductive - Effects on Newborn - weaning or lactation index (e.g., # alive at weaning per # alive at day 4) Reproductive - Effects on Newborn - growth statistics (e.g.%, reduced weight gain)

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 12600 mg/kg

SEX/DURATION :: female 1-21 day(s) after conception

TOXIC EFFECTS :: Reproductive - Effects on Newborn - behavioral

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 1200 mg/kg

SEX/DURATION :: female 9 day(s) after conception

TOXIC EFFECTS :: Reproductive - Specific Developmental Abnormalities - musculoskeletal system

TYPE OF TEST :: DNA damage

TYPE OF TEST :: Unscheduled DNA synthesis

TYPE OF TEST :: Unscheduled DNA synthesis

TYPE OF TEST :: Dominant lethal test

TYPE OF TEST :: Mutation test systems - not otherwise specified

TYPE OF TEST :: DNA inhibition

TYPE OF TEST :: Dominant lethal test

TYPE OF TEST :: Sperm Morphology

MUTATION DATA

TYPE OF TEST :: Cytogenetic analysis

TEST SYSTEM :: Rodent - hamster Ovary

REFERENCE :: MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 345,73,1995 *** REVIEWS *** ACGIH TLV-Not classifiable as a human carcinogen 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 ACGIH TLV-TWA 10 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: TLV/BEI,1997 IARC Cancer Review:Animal Limited Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 40,161,1986 IARC Cancer Review:Human No Adequate Data IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 40,161,1986 IARC Cancer Review:Group 3 IMSUDL IARC Monographs, Supplement. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) No.1- 1979- Volume(issue)/page/year: 7,56,1987 TOXICOLOGY REVIEW FEPRA7 Federation Proceedings, Federation of American Societies for Experimental Biology. (Bethesda, MD) V.1-46, 1942-87. Volume(issue)/page/year: 35,89,1976 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:TWA 10 mg/m3 JAN 1993 OEL-BELGIUM:TWA 10 mg/m3 JAN 1993 OEL-FINLAND:TWA 10 mg/m3;STEL 20 mg/m3;Skin JAN 1993 OEL-FRANCE:TWA 10 mg/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 10 mg/m3 JAN 1993 OEL-SWITZERLAND:TWA 10 mg/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 10 mg/m3 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 2,6-DI-t-BUTYL-p-CRESOL-air:10H TWA 10 mg/m3 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 - 83383 No. of Facilities: 1526 (estimated) No. of Industries: 32 No. of Occupations: 39 No. of Employees: 28860 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 83383 No. of Facilities: 27242 (estimated) No. of Industries: 210 No. of Occupations: 154 No. of Employees: 591238 (estimated) No. of Female Employees: 163774 (estimated)

抗氧剂BHT安全信息

[ 符号 ]:

GHS09

[ 信号词 ]:
Warning

[ 危害声明 ]:
H410

[ 警示性声明 ]:
P273-P501

[ 个人防护装备 ]:
dust mask type N95 (US);Eyeshields;Gloves

[ 危害码 (欧洲) ]:
Xn:Harmful

[ 风险声明 (欧洲) ]:
R22;R36/37/38

[ 安全声明 (欧洲) ]:
S26-S36-S37/39

[ 危险品运输编码 ]:
3077

[ WGK德国 ]:
1

[ RTECS号 ]:
GO7875000

[ 包装等级 ]:
III

[ 危险类别 ]:
9

[ 海关编码 ]:
2907199090

抗氧剂BHT合成路线

抗氧剂BHT上下游产品

抗氧剂BHT上游产品

抗氧剂BHT下游产品

抗氧剂BHT制备

1. 将对甲酚、叔丁醇按摩尔比1：1.1投入反应釜加热溶解。在催化剂磷酸作用下，于65～70℃强烈搅拌下反应；反应完毕后，反应产物先用10%的氢氧化钠溶液洗至碱性，再用水洗至中性；除去溶剂，用乙醇重结晶即得成品。反应方程式如下：

2. 在98%的对甲酚和2%浓硫酸的混合物中通人异丁烯，于65～70℃下反应5h；用60℃的热水洗去酸，再先后用10%NaOH和热水洗至中性得粗品。将粗品溶于50%的热乙醇中，并添加0.5%的硫脲，趁热过滤、甩干，干燥即得成品，产率高达90%～95%，纯度99.5%，熔点>69.5℃。
工业上采用主、副塔串联工艺。先将对甲酚和催化剂加入主、副塔内，主塔温度控制在65～80℃，副塔温度控制在50～70℃。异丁烯气体从主塔底部通入，其大部分与主塔内对甲酚反应，剩余部分从主塔顶部出来，进入副塔底部进一步与对甲酚反应。主塔反应周期控制在4～5h，当反应结束后，停止通异丁烯气体，加入20%的NaOH溶液，并用压缩气体鼓泡。中和后的烷基化产物经蒸馏塔(8块理论塔板)分离得粗品。后者用95%的乙醇溶解，离子交换去无机盐，冷却至10～20℃结晶、分离、真空干燥得到熔点大于69℃的产品。反应方程式如下：

3. 将对甲酚、叔丁醇加热溶解，以磷酸为催化剂，在一定温度下反应，反应产物先用氢氧化钠溶液洗至碱性，再用水洗至中性，最后蒸馏、重结晶即可得到二丁基羟基甲苯。或者将异丁烯与甲酚和浓硫酸混合，在一定温度下反应一定时间，中和得粗品，再将粗品溶于乙醇，加入硫脲，趁热过滤、甩干、干燥制得。

4. 在反应釜中加入对甲酚和催化剂硫酸，加热升温至65℃时通入异丁烯，进行烷基化反应，烷基化后得到防老剂264溶液。反应方程式

得到的防老剂264溶液用60℃的热水洗涤，除去酸性，再加碳酸钠中和，最后用70～80℃水洗涤至中性后送入结晶槽，冷却至10～15℃时结晶析出，离心甩干后得粗品。将粗品溶于80～90℃的50%乙醇及0.5%的硫脲，趁热过滤，离心甩干、干燥，即得成品。

在具体生产过程中，甲苯酚可以采用生产对甲酚得到的副产物（混酚）原料，催化剂一般用硫酸，也可采用杂多酸。异丁烯的制备可采用异丁醇经汽化后，连续定量地通过催化剂活性氧化铝，在370～390℃下进行脱水反应，生成的异丁烯气体经冷却、分水、干燥，即可供烷基化使用。每吨产品消耗对甲苯酚950kg，异丁醇1200kg，酒精（95%）500kg。

5. 烟草：FC，BU，OR，18。

抗氧剂BHT海关

[ 海关编码 ]: 2907199090

[ 中文概述 ]:
2907199090 其他一元酚. 增值税率:17.0% 退税率:9.0% 监管条件:无最惠国关税:5.5% 普通关税:30.0%

[ 申报要素 ]: 品名, 成分含量, 用途

[ Summary ]:
2907199090 other monophenols VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

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