3,5-Di-tert-butylcatechol(1020-31-1)
- Name: 3,5-Di-tert-butylcatechol
- Synonyms:Pyrocatechol,3,5-di-tert-butyl- (6CI,7CI,8CI);3,5-Bis(1,1-dimethylethyl)-1,2-benzenediol;3,5-Bis(tert-butyl)catechol;3,5-Di-t-butylcatechol;3,5-Di-tert-butyl-1,2-benzenediol;3,5-Di-tert-butyl-1,2-dihydroxybenzene;3,5-Di-tert-butyl-o-hydroquinone;3,5-Di-tert-butylpyrocatechol;4,6-Di-tert-butyl-1,2-benzenediol;4,6-Di-tert-butylpyrocatechol;DTBQH2;NSC 59767;
- Molecular Formula:C14H22O2
- Molecular Weight:222.327
- CAS Registry Number:1020-31-1
- EINECS:213-816-9
- Melting Point:95-100 °C(lit.)
- Water Solubility:Insoluble in water.
CAS No.1020-31-1 3,5-Di-tert-butylcatechol (DTBC)
Assay:99.5% Appearance:white or almost white crystalline powder Package:Pack & Store:25kg cardboard barrels lined with plastic bags; or otherwise customized Storage:In cool ,dry place Transportation:Preservce in well-closed containers, prptected from light, Application:USP34 Or EP STANDERUsed as Antibiotic and Antimicrobial Agents
Min. Order:50Kilogram
Supplier:Lonwin Chemical Group Limited [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol Manufacturer/High quality/Best price/In stock
Assay:98% Appearance:white powder Package:according to the clients requirement Storage:Store in dry, dark and ventilated place. Transportation:by sea or by air Application:It is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and Dyestuff.
Min. Order:1Kilogram
Supplier:Dayang Chem (Hangzhou) Co.,Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol cas no: 1020-31-1
Assay:99% Appearance:white to pale brown solid Package:as you requested Storage:Room temperature Transportation:by courier,by sea Application:Organic Chemicals
Min. Order:1Metric Ton
Supplier:HENAN NEW BLUE CHEMICAL CO.,LTD [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Appearance:powder or liquid Package:according to customer requirements Storage:store in dry dark and ventilated place Transportation:By Sea/Air/Courier Application:It is an important raw material.
Min. Order:10Gram
Supplier:Zibo Hangyu Biotechnology Development Co., Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Package:According client's requirements Transportation:by sea/by air/by courier Application:Chemical products
Min. Order:1Kilogram
Supplier:Hangzhou ZeErRui Chemical Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol CAS:1020-31-1
Assay:99% Appearance:Brown powder Package:According to customer requirements Storage:Avoid light, ventilation and shade Transportation:Sea or Air Application:Medical research field
Min. Order:1Gram
Supplier:Qingdao Beluga Import and Export Co., LTD [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol CAS锛?020-31-1
Assay:>99% Appearance:White Package:Inside plastic outside Storage:Store at RT. Transportation:We ship goods via DHL, Fedex, UPS, TNT, China post, NL Post and other couriers, weight from 10g to 1000kg or even bulker.? Application:Used in pharmaceutical intermediates
Min. Order:1Kilogram
Supplier:Hebei Nengqian Chemical Import and Export Co., LTD [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol CAS NO.1020-31-1
Assay:99.0% Appearance:liquid Package:Grams, Kilograms Storage:Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials. Transportation:According to customer request Application:For R&D and commerical use
Min. Order:100Gram
Supplier:Chemlyte Solutions [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol factory price
Assay:99% Appearance:White to pale brown powder Package:25kg/drum Storage:room temperature Transportation:Express/Sea/Air Application:chemicals
Min. Order:1Kilogram
Supplier:Hangzhou Sartort Biopharma Co., Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol CAS NO.1020-31-1
Assay:99% Appearance:White to light brown powder Package:25kg/drum, also according to the clients requirement Storage:Store In Dry, Cool And Ventilated Place Transportation:By Sea Or By Air Application:Used as a polymerization inhibitor and antioxidant
Min. Order:1Metric Ton
Supplier:EAST CHEMSOURCES LIMITED [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Appearance:Powder Package:Glass bottle, customizable Storage:Store at room temperature Transportation:Air and sea transportation Application:Pharmaceutical Industry
Min. Order:0
Supplier:Shanghai Wibson Biotechnology Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:鈮?8% Appearance:powder Package:BAG Storage:In cool ,dry place Transportation:Air or sea freight Application:for pharma use
Min. Order:1Kilogram
Supplier:Qingdao Chengyuan Kaisheng Industry and Trade Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 1,2-Benzenediol,3,5-bis(1,1-dimethylethyl)-
Assay:99% Appearance:White fine powder Package:according to the clients requirement Storage:Store in dry dark and ventilated place Transportation:Transportation by express, air, sea; port mainly to Qingdao / Tianjin / Shanghai, or according to customer needs to send different ports and aviation. Application:It is an important raw material.
Min. Order:1Kilogram
Supplier:Shandong Hanjiang Chemical Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:98%min Package:5kg 25kg According to clients' requirement Storage:Store in dry, dark and ventilated place Application:Fine chemical industry
Min. Order:0Metric Ton
Supplier:Hangzhou Keyingchem Co.,Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99%min. Appearance:Colorless liquid Package:1kg/Export worthy packing; 25kg/drum Storage:In well-closed container, protected from light and in cool & dry place. Transportation:By Air, By Sea, By courier (door to door, DHL/FedEx/UPS) Application:R&D and production for pharmaceuticals and chemicals
Min. Order:0
Supplier:LIDE PHARMACEUTICALS LIMITED [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:0.98 Appearance:Off white to slight yellow solid Package:1L 5L 10L 25L bottle Storage:Stored in shaded, cool and dry places Transportation:Handle with cares to avoid damaging the packages. Protect them from sunshine or rain. We can send by Fedex, by ship or by plane according to international rules. Application:pharma intermediate
Min. Order:0
Supplier:Antimex Chemical Limied [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:HPLC鈮?8% Appearance:powder Storage:Sealed in dry,Room Temperature Transportation:by express or by sea Application:for pharma use
Min. Order:0
Supplier:Hangzhou Shanyi Biotechnology Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99.90% Appearance:solid or liquid Package:drum and bag Storage:in sealed air resistant place Transportation:by sea or air Application:for pharma use
Min. Order:0
Supplier:Kono Chem Co.,Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Package:25kg/Drum Storage:100tons Transportation:By air/By sea Application:Chemical industry
Min. Order:0
Supplier:Hebei Mujin Biotechnology Co.,Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-di-tert-Butylcatechol
Assay:98% Package:25kg/drum,or as per customers'demand Transportation:air,sea,courier Application:API,Pharmaceutical intermediates
Min. Order:0
Supplier:GIHI CHEMICALS CO.,LIMITED [
China (Mainland)]
CAS No.1020-31-1 1,2-Benzenediol,3,5-bis(1,1-dimethylethyl)-
Assay:98% HPLC Package:1kg Application:pharmaceutical intermediates
Min. Order:0
Supplier:Hangzhou Dingyan Chem Co., Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:98% Application:For research use only.
Min. Order:0
Supplier:HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD [
China (Mainland)]
CAS No.1020-31-1 1,2-Benzenediol,3,5-bis(1,1-dimethylethyl)-
Assay:98%min Appearance:Off-white to light yellow powder Package:According to the clients requirement. Storage:Keep in cool place. Application:Pharmaceutical intermediates
Min. Order:0
Supplier:Hangzhou J&H Chemical Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99.0% min Appearance:Highest quality appearance Package:25kgs/drum锛?00kg/drum锛汭BC TANK Storage:Keep in dry and well ventilated warehouse, keep sealed Transportation:By air and by sea Application:Extremely good quality, widely used in Pharmaceutical Industry, Food Industry, agricultural industry etc.
Min. Order:1Kilogram
Supplier:Hangzhou Johoo Chemical Co., Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol CAS NO.1020-31-1
Assay:鈮?9.0% Appearance:White powder Package:25kg drum/bag Storage:Keep in dry and cool place Transportation:by Sea, air and express Application:銆?Use 1 銆? A nutritional supplement. One of the essential amino acids in the human body. Because the price is higher than DL-methionine and the effect is equal, DL-methionine is often used. 銆?Use
Min. Order:1Metric Ton
Supplier:KAISA GROUP INC [
United States]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Package:box or opp package Storage:cool drum Transportation:air or sea Application:3,5-Di-tert-butylcatechol
Min. Order:1Milligram
Supplier:weifang yangxu group co.,ltd [
China (Mainland)]
CAS No.1020-31-1 1,2-Benzenediol,3,5-bis(1,1-dimethylethyl)-
Assay:99% Package:drum Transportation:By Sea/Air/DHL Application:Henan Wentao Chemical Product Co., Ltd.
Min. Order:0
Supplier:Henan Wentao Chemical Product Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Appearance:White to pale brown Solid Package:as your requirement Storage:Keep it in dry,shady and cool place Transportation:by Sea, by Air, by Land/EMS/TNT/DHL/ Application:Pharma;Industry;Agricultural;chemical reaserch
Min. Order:0
Supplier:Hubei Jiutian Bio-medical Technology Co., Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Appearance:white powder Package:as per customers'demand Storage:Store in dry, dark and ventilated place Transportation:air,sea,courier Application:Widely used in various universities, research institutes, medicine, food, electronics, agriculture, chemical industry, petrochemicals and many other fields of the national economy
Min. Order:0
Supplier:Jilin Tianyun New Materials Co., Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99.90% Appearance:solid or liquid Package:Foil bag; Drum; Plastic bottle Storage:in sealed air resistant place Transportation:by sea or air Application:Pharma;Industry;Agricultural
Min. Order:0
Supplier:Xi`an Eastling Biotech Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Application:API
Min. Order:0
Supplier:Wuhan Bright Chemical Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:98% Application:For research use only.
Min. Order:0
Supplier:Hebei Jinshengzhongtai Industry Co.,Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Application:API
Min. Order:0
Supplier:DB BIOTECH CO., LTD [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Application:API
Min. Order:0
Supplier:Xian Changyue Biological Technology Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 Pharmaceutical Grade CAS 1020-31-1 with competitive price
Assay:99% Appearance:White powder Package: [Packaging]20mg, 50mg,100mg,1g,10g,100g,according to customers' requirements Storage: should be stored in a well-closed container at low temperature, keep away from moisture, heat and light. Transportation:1. Samples 1kg-10kg are shipped by international express. 2. 50kg-100kg of goods are transported by dedicated line logistics. 3. Cargo 100kg-1ton is transported by dedicated line logistics. Application:Chemical raw materials, pharmaceutical intermediates, cosmetic raw materials, etc.
Min. Order:1Kilogram
Supplier:Zhuozhou Wenxi import and Export Co., Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol CAS NO.1020-31-1
Assay:99% Appearance:liquid or powder Package:according to the clients requirement Storage:Dry and Cool Place Transportation:UPS FedEx ,DHL,EXPRESS LINE Application:healing drugs
Min. Order:1Gram
Supplier:Shandong Mopai Biotechnology Co., LTD [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99.0% Appearance:Clear, colorless liquid Package:according to your requirement Storage:Store in a dry, dark and ventilated place Transportation:by air/by sea /by train Application:lt is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and Dyestuff.
Min. Order:1Kilogram
Supplier:Suzhou Senfeida Chemical Co., Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol CAS NO.1020-31-1
Assay:99% Appearance:white powder Package:drum or based on customers' requirement Storage:normal temperature storage Transportation:by sea, by air Application:We have different specifications for different applications
Min. Order:1Metric Ton
Supplier:Bluecrystal chem-union [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylpyrocatechol
Assay:99% Haccp,,Halal,SC US FDA GMP ISO14001 Appearance:As per Certificate of analysis and our TDS, MSDS Package:Export standard and according to the clients requirement Storage:Store in dry, dark and ventilated place;ISO / Kosher /GMP licence commercial bulk capacity factory in China Transportation:By AIR or by SEA GMP licence / US-FDA,South Korea-KFDA Application:It is an important raw material and intermediate for chemical industry.
Min. Order:5Kiloliter
Supplier:Chemwill Asia Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-ditert-butylbenzene-1,2-diol
Assay:97% Appearance:Powder or liquid Package:According to customer Storage:Store in a tightly closed container, in a cool and dry place. Transportation:Fedex,DHL,TNT,BY SEA and BY AIR Application:Medicinal Chemistry Biomedicine Pharmaceutical intermediates Chemistry experiment Biological experiments Chemical reagent For R&D use only.
Min. Order:10Milligram
Supplier:Amadis Chemical Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylbenzene-1,2-diol
Assay:99% Package:DRUM Storage:room temperature Transportation:AIR/SEA Application:mainly for medical use for R&D purpose use only
Min. Order:1Kilogram
Supplier:Enke Pharma-tech Co.,Ltd. 锛圕angzhou, China 锛?/a> [
China (Mainland)]
CAS No.1020-31-1 3,5-DTBC
Assay:99% Appearance:White to light yellow to light orange fluffy powder Package:according to your requirement Storage:White to light yellow to light orange fluffy powder Transportation:by air /by train/by sea Application:lab
Min. Order:1Kilogram
Supplier:Jiangsu Xinsu New Materials Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:HPLC鈮?8% Appearance:powder Storage:Sealed in dry,Room Temperature Transportation:by express or by sea Application:for pharma use
Min. Order:0
Supplier:Falcon Life Sciences Pvt. Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol CAS No.1020-31-1
Assay:99.90% Appearance:solid or liquid Package:As customer's requested Storage:sealed in cool and dry place Transportation:by courier/air/sea Application:Pharma Intermediate
Min. Order:0
Supplier:Guangdong Juda Chemical Industrial Co.,Limited [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol 1020-31-1
Assay:98% Appearance:solid or liquid Package:Foil bag; Drum; Plastic bottle Storage:in sealed air resistant place Transportation:by sea or air Application:Pharma;Industry;Agricultural
Min. Order:0
Supplier:Hunan Russell Chemicals Technology Co.,Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol cas no. 1020-31-1 98%
Assay:0.98 Package:Grams, Kilograms Transportation:According to customer request Application:For R&D
Min. Order:0
Supplier:Win-Win chemical Co.Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Appearance:95%+ Package:R&D,Pilot run Transportation:per client require
Min. Order:0
Supplier:Hunan chemfish Pharmaceutical co.,Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:99% Application:Industrial use
Min. Order:0
Supplier:Yinglang Chemical Company [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:98% Application:chemical reagent
Min. Order:0
Supplier:SHANDONG BENRITE NEW CHEMICAL MATERIALS CO.,LTD. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:98% Application:For research use only.
Min. Order:0
Supplier:Qingdao Bravery International Trade Co., Ltd [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol CAS NO.1020-31-1
Assay:99% Application:3,5-Di-tert-butylcatechol CAS NO.1020-31-1
Min. Order:0
Supplier:Wuhan 90000 Lithium Industry and Trade Co., Ltd. [
China (Mainland)]
CAS No.1020-31-1 3,5-Di-tert-butylcatechol
Assay:98% Package:According to the demand of customer Storage:Sealed, dry, microtherm , avoid light and smell. Transportation:by air or by sea Application:Organic synthesis
Min. Order:0
Supplier:Henan Allgreen Chemical Co.,Ltd [
China (Mainland)]
- Dayang Chem (Hangzhou) Co.,Ltd.

Other Product
- 77372-66-8/Hydroxylamine-O-sulfonic acid, N-((4-butoxyphenyl)acetyl)-, compd. wit h pyridine (1:1)
- 140851-19-0/D-Galactitol,1,4-anhydro-3-O-b-D-galactopyranosyl-
- 78280-45-2/1,3-dimethyl-7-{2-[(1-methylethyl)(phenyl)amino]ethyl}-3,7-dihydro-1H-purine-2,6-dione hydrochloride
- 62841-14-9/[2-[2-[2-[[6-amino-2-[1-[(2-amino-2-carbamoyl-ethyl)amino]-2-carbamoyl-ethyl]-5-methyl-pyrimidine-4-carbonyl]amino]-2-[[3-hydroxy-4-[[2-hydroxy-1-[2-[4-[4-(3-morpholin-4-ylpropylcarbamoyl)-1,3-thiazol-2-yl]-1,3-thiazol-2-yl]ethylcarbamoyl]propyl]carbamoyl]pentan-2-yl]carbamoyl]-1-(3H-imidazol-4-yl)ethoxy]-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl] carbamate
- 41378-34-1/2-(3-amino-4-hydroxybenzoyl)benzoic acid
- 22912-13-6/1-(1-(2-thienyl)cyclohexyl)pyrrolidine
- 66968-88-5/5-Ethyl-1-methyl-5-(1-methylpentyl)barbituric acid
- 90900-65-5/2'-deoxy-lin-benzoadenosine diphosphate
- 81720-98-1/Ethanimidamide, 2-(2-cyclopropylphenoxy)-N-hydroxy-, monohydrochloride
- 3201-21-6/3-Ethoxy-5-methyl-1H-pyrazole
- 2056-22-6/1,7-Heptanediamine, N,N-bis(o-chlorobenzyl)-, dihydrochloride
- 73156-19-1/Algo-buscopan
- 6373-07-5/AKA215
- 84890-90-4/[(1R)-2-(4-hydroxyphenyl)-1-[[(1S)-1-[[(2S)-3-methyl-2-methylamino-but anoyl]carbamoyl]-2-phenyl-ethyl]amino]ethyl]phosphonic acid
- 64784-05-0/5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid,7-[[(2S)-[(aminocarbonyl)amino]-2-thienylacetyl]amino]-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-,(6R,7R)- (9CI)
- 72102-37-5/N,N-Dimethylformamide, titanium trichloride, aluminum chloride complex
- 110331-08-3/3-{[(3-ethoxynaphthalen-2-yl)carbonyl]oxy}-N,N-diethylpropan-1-aminium chloride
- 57517-08-5/9-Isopropyl-2,2,5-trimethylphenaleno[1,9-bc]furan-8(2H)-one
- 1020-31-1/3,5-Di-tert-butylcatechol
- 51952-65-9/Zinc methanearsonate
- 59257-18-0/2-({2,2-dimethyl-4-[3-(trifluoromethyl)phenyl]-3,4-dihydro-2H-chromen-7-yl}oxy)-N,N-dimethylethanamine hydrochloride (1:1)
- 158760-99-7/(3S,6aS,9S,10R,10aR)-4-formyl-3,10-dihydroxy-7,7-dimethyl-1-oxo-3,3a,6,6a,7,8,9,10-octahydronaphtho[1,8a-c]furan-9-yl 2-hydroxydecanoate
- 624-40-8/1,2,4,5-tetrazinane-3,6-dione
- 203200-45-7/PTR 3021
- 130518-19-3/Benzo[6,7]cyclohepta[1,2,3-cd]benzofuran-4,8,10-triol,1,6,7,11b-tetrahydro-1,7-bis(4-hydroxyphenyl)-, (1S,7S,11bS)- (9CI)
- 3263-46-5/1,8-dihydroxy-4-[[3-(1-hydroxyethyl)phenyl]amino]-5-nitroanthraquinone
- 83138-95-8/6H-Benzo[d]naphtho[1,2-b]pyran-6-one,4-(6- deoxy-3-C-methyl-â-D-gulopyranosyl)-8- ethenyl-1-hydroxy-10,12-dimethoxy-
- 66859-76-5/2,2-Diphenyl-1-ethyl-4-piperidino-1-butanimine
- 93251-90-2/benzenamine, N-2-propen-1-yl-, chloride, rhodium salt (3:2)
- 63224-47-5/4-[(2,6-dichloro-4-nitrophenyl)azo]-2,5-dimethoxybenzenediazonium tetrachlorozincate (2:1)