CAS No. 101-27-9

Formula: C11H9Cl2NO2
Basic Info

Molecular Weight
Exact Mass


4-chloro-2-butynyl m-chlorocarbanilate


Carbyne (herbicide)

4-chloro-2-butynyl N-(m-chlorophenyl)carbamate





4-chlorobut-2-ynyl 3-chlorocarbanilate

4-chloro-2-butynyl 3-chlorocarbanilate

4-chlorobut-2-ynyl N-(3-chlorophenyl)carbamate

N-(m-chlorophenyl)carbamic acid,4-chloro-2-butynyl ester

4-chloro-2-butyn-1-yl N-(3-chlorophenyl)carbamate


4-Chlorobut-2-ynyl 3-chlorophenylcarbamate


4-Chlorobut-2-yn-1-yl (3-chlorophenyl)carbamate


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1.394 g/cm3
Boiling Point
340.8ºC at 760 mmHg
Melting Point
Flash Point
Refractive Index
Storage Condition
Vapor Pressure
8.39E-05mmHg at 25°C
Safety Info
Safety Statements
S24; S36/37; S60; S61
Risk Statements
HS Code
UN3077 9/PG 3
Hazard Codes
SDS 1.0
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According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017


1.1 GHS Product identifier

Product name barban

1.2 Other means of identification

Product number -
Other names 4-Chlorobut-2-yn-1-yl (3-chlorophenyl)carbamate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Herbicide
Uses advised against no data available

1.4 Supplier's details

Company MOLBASE (Shanghai) Biotechnology Co., Ltd.
Address Floor 4 & 5, Building 12, No. 1001 North Qinzhou Road,
Xuhui District, Shanghai, China
Telephone +86(21)64956998
Fax +86(21)54365166

1.5 Emergency phone number

Emergency phone number +86-400-6021-666
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

2.Hazard identification

2.1 Classification of the substance or mixture

Acute toxicity - Oral, Category 4

Skin sensitization, Category 1

Hazardous to the aquatic environment, short-term (Acute) - Category Acute 1

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 1

2.2 GHS label elements, including precautionary statements

Signal word


Hazard statement(s)

H302 Harmful if swallowed

H317 May cause an allergic skin reaction

H410 Very toxic to aquatic life with long lasting effects

Precautionary statement(s)

P264 Wash ... thoroughly after handling.

P270 Do not eat, drink or smoke when using this product.

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P272 Contaminated work clothing should not be allowed out of the workplace.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P273 Avoid release to the environment.


P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor/…if you feel unwell.

P330 Rinse mouth.

P302+P352 IF ON SKIN: Wash with plenty of water/...

P333+P313 If skin irritation or rash occurs: Get medical advice/attention.

P321 Specific treatment (see ... on this label).

P362+P364 Take off contaminated clothing and wash it before reuse.

P391 Collect spillage.




P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification


3.Composition/information on ingredients

3.1 Substances

Chemical name Common names and synonyms CAS number EC number Concentration
barban barban 101-27-9 none 100%

4.First-aid measures

4.1 Description of necessary first-aid measures

General advice

Consult a physician. Show this safety data sheet to the doctor in attendance.

If inhaled

If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician.

In case of skin contact

Wash off with soap and plenty of water. Consult a physician.

In case of eye contact

Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.

If swallowed

Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

4.2 Most important symptoms/effects, acute and delayed

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]: Inhalation of material may be harmful. Contact may cause burns to skin and eyes. Inhalation of Asbestos dust may have a damaging effect on the lungs. Fire may produce irritating, corrosive and/or toxic gases. Some liquids produce vapors that may cause dizziness or suffocation. Runoff from fire control may cause pollution. (ERG, 2016)

4.3 Indication of immediate medical attention and special treatment needed, if necessary

Skin contamination should be treated promptly by washing with soap and water. Contamination of the eyes should be treated immediately by prolonged flushing of the eyes with large amounts of clean water. If dermal or ocular irritation persists, medical attention should be obtained without delay. /Other Herbicides/

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media

If material /is/ on fire or involved in /a/ fire do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use "alcohol" foam, dry chemical or carbon dioxide. /Carbamate pesticide, liquid, nos, (compounds and preparations) (agricultural insecticides, nec, liquid); Carbamate pesticide, liquid, nos (compounds and preparations) (agricultural insecticides, nec, liquid); Carbamate pesticide, liquid, nos (compounds and preparations) (insecticides, other than agricultural, nec/

5.2 Specific hazards arising from the chemical

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]: Some may burn but none ignite readily. Containers may explode when heated. Some may be transported hot. For UN3508, be aware of possible short circuiting as this product is transported in a charged state. (ERG, 2016)

5.3 Special protective actions for fire-fighters

Wear self-contained breathing apparatus for firefighting if necessary.

6.Accidental release measures

6.1 Personal precautions, protective equipment and emergency procedures

Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8.

6.2 Environmental precautions

Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided.

6.3 Methods and materials for containment and cleaning up

A system for removing pesticides from the wash water produced by pesticide applicators as they clean their equipment has been developed. The first step is the flocculation/coagulation and sedimentation of the pesticide-contaminated wash water. The supernatant from the first step is then passed through activated carbon columns. /Pesticides/

7.Handling and storage

7.1 Precautions for safe handling

Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2.

7.2 Conditions for safe storage, including any incompatibilities

Aluminum, phenolic-lined cans, or glass are recommended for lengthy storage

8.Exposure controls/personal protection

8.1 Control parameters

Occupational Exposure limit values

no data available

Biological limit values

no data available

8.2 Appropriate engineering controls

Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday.

8.3 Individual protection measures, such as personal protective equipment (PPE)

Eye/face protection

Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).

Skin protection

Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it.

Respiratory protection

Wear dust mask when handling large quantities.

Thermal hazards

no data available

9.Physical and chemical properties

Physical state Barban is a crystalline solid. Water solubility is 11 ppm at 20°C. Used as a selective herbicide.
Colour Crystalline solid
Melting point/ freezing point 75-76ºC
Boiling point or initial boiling point and boiling range 340.8ºC at 760 mmHg
Flammability no data available
Lower and upper explosion limit / flammability limit no data available
Flash point 159.9ºC
Auto-ignition temperature no data available
Decomposition temperature no data available
pH no data available
Kinematic viscosity no data available
Solubility At 25°C g/100 g solvent: benzene 32.7 g; n-butylbenzene 11.3 g; n-dodecane less than 0.1 g; n-hexane 0.14 g; isopropylbenzene less than 7.0 g; kerosene 0.39 g; toluene 25.7 g; 2,2,4-trimethylpentane more than 0.3 g; xylene 27.9 g; water 0.0011 g
Partition coefficient n-octanol/water (log value) log Kow = 3.41 /Estimated/
Vapour pressure 8.39E-05mmHg at 25°C
Density and/or relative density 1.394 g/cm3
Relative vapour density no data available
Particle characteristics no data available

10.Stability and reactivity

10.1 Reactivity

no data available

10.2 Chemical stability

Stable under normal conditions of use; hydrolysis is very rapid in alkali with displacement of the terminal chlorine substituent, DT50 58 sec (pH 13, 25°C).

10.3 Possibility of hazardous reactions

BARBAN is a carbamate ester. Carbamates are chemically similar to, but more reactive than amides. Like amides they form polymers such as polyurethane resins. Carbamates are incompatible with strong acids and bases, and especially incompatible with strong reducing agents such as hydrides. Flammable gaseous hydrogen is produced by the combination of active metals or nitrides with carbamates. Strongly oxidizing acids, peroxides, and hydroperoxides are incompatible with carbamates.

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

no data available

10.6 Hazardous decomposition products

When heated to decomposition it emit very toxic fumes of /hydrogen chloride and nitrogen oxides/.

11.Toxicological information

Acute toxicity

  • Oral: LD50 Rabbit oral 600 mg/kg
  • Inhalation: no data available
  • Dermal: LD50 Rat percutaneous >1600 mg/kg

Skin corrosion/irritation

no data available

Serious eye damage/irritation

no data available

Respiratory or skin sensitization

no data available

Germ cell mutagenicity

no data available


no data available

Reproductive toxicity

no data available

STOT-single exposure

no data available

STOT-repeated exposure

no data available

Aspiration hazard

no data available

12.Ecological information

12.1 Toxicity

  • Toxicity to fish: LC50 Rainbow trout 0.6 mg/L (96 hr test) /Conditions of bioassay not specified in source examined
  • Toxicity to daphnia and other aquatic invertebrates: no data available
  • Toxicity to algae: no data available
  • Toxicity to microorganisms: no data available

12.2 Persistence and degradability

AEROBIC: Barban was found to disappear more rapidly in non-autoclaved soil than in autoclaved soil(1). Barban was degraded to 3-chloroaniline by a soil isolate of Penicillium sp. The barban-hydrolyzing enzyme was presumed to be an amidase(2). It was determined that the alkaline hydrolysis of barban leads to the degradation product 3-chloroaniline(3).

12.3 Bioaccumulative potential

An estimated BCF of 160 was calculated for barban(SRC), using water solubility of 11 mg/L,(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is high (SRC), provided the compound is not metabolized by the organism(SRP).

12.4 Mobility in soil

The Koc of barban is estimated as 1,200(SRC), derived from its water solubility of 11 mg/L(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that barban is expected to have slight mobility in soil. Using TLC and aluminum oxide sorbent, the Rf value of barban was determined to be 0.5(4). The phenylcarbamate herbicides are much more water soluble than the substituted anilines(5). In spite of this, however, they are very immobile in soil systems. These compounds have been shown to be activated by adsorption to soil organic matter. Compounds in this group include barban. The mechanism of adsorption to soil organic matter is thought to involve hydrogen bonding between the carboxyl groups of the organic matter and the nitrogen and carbonyl oxygen of the carbamate(5).

12.5 Other adverse effects

no data available

13.Disposal considerations

13.1 Disposal methods


The material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.

Contaminated packaging

Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

14.Transport information

14.1 UN Number

ADR/RID: UN3077 IMDG: UN3077 IATA: UN3077

14.2 UN Proper Shipping Name


14.3 Transport hazard class(es)


14.4 Packing group, if applicable


14.5 Environmental hazards

ADR/RID: yes IMDG: yes IATA: yes

14.6 Special precautions for user

no data available

14.7 Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code

no data available

15.Regulatory information

15.1 Safety, health and environmental regulations specific for the product in question

Chemical name Common names and synonyms CAS number EC number
barban barban 101-27-9 none
European Inventory of Existing Commercial Chemical Substances (EINECS) Listed.
EC Inventory Listed.
United States Toxic Substances Control Act (TSCA) Inventory Not Listed.
China Catalog of Hazardous chemicals 2015 Listed.
New Zealand Inventory of Chemicals (NZIoC) Not Listed.
Philippines Inventory of Chemicals and Chemical Substances (PICCS) Not Listed.
Vietnam National Chemical Inventory Not Listed.
Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Not Listed.

16.Other information

Information on revision

Creation Date Aug 13, 2017
Revision Date Aug 13, 2017

Abbreviations and acronyms

  • CAS: Chemical Abstracts Service
  • ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
  • RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
  • IMDG: International Maritime Dangerous Goods
  • IATA: International Air Transportation Association
  • TWA: Time Weighted Average
  • STEL: Short term exposure limit
  • LC50: Lethal Concentration 50%
  • LD50: Lethal Dose 50%
  • EC50: Effective Concentration 50%


  • IPCS - The International Chemical Safety Cards (ICSC), website:
  • HSDB - Hazardous Substances Data Bank, website:
  • IARC - International Agency for Research on Cancer, website:
  • eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website:
  • CAMEO Chemicals, website:
  • ChemIDplus, website:
  • ERG - Emergency Response Guidebook by U.S. Department of Transportation, website:
  • Germany GESTIS-database on hazard substance, website:
  • ECHA - European Chemicals Agency, website:

Disclaimer: The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. We as supplier shall not be held liable for any damage resulting from handling or from contact with the above product.
NMR Spectrum 1H NMR : Predict
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Mass Spectrum Mass spectrum (electron ionization)
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Analysis Methods
Kovats' RI, non-polar column, temperature ramp
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Column Shape
Active Phase(℃)
Retention index
Temperature Control
temperature ramp
He, 6. K/min; Column length: 15. m; Column diameter: 0.25 mm; T<sub>start</sub>: 100. C; T<sub>end</sub>: 270. C
Hall, G.L.Whitehead, W.E.Mourer, C.R.Shibamoto, T.A new gas chromatographic retention index for pesticides and related compoundsJ. Hi. Res. Chromatogr. Chromatogr. Comm.1986, 9, 5, 266-271.
Synthesis Route
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Type of Test
LD50 - Lethal dose, 50 percent kill
Exposure Route
Species Observed
Rodent - rat
527 mg/kg
Toxic Effects
Details of toxic effects not reported other than lethal dose value--
Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure, Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982 Volume(issue)/page/year: -,35,1982
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Type of Test
LC50 - Lethal concentration, 50 percent kill
Exposure Route
Species Observed
Rodent - rat
27400 mg/m3/4H
Toxic Effects
Details of toxic effects not reported other than lethal dose value--
Prehled Prumyslove Toxikologie; Organicke Latky, Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,952,1986
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Type of Test
LD50 - Lethal dose, 50 percent kill
Exposure Route
Administration onto the skin
Species Observed
Rodent - rat
>1600 mg/kg
Toxic Effects
Details of toxic effects not reported other than lethal dose value--
World Review of Pest Control. (London, UK) V.1-10, 1962-71. Discontinued. Volume(issue)/page/year: 9,119,1970

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