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  • Product Name: Parbendazole
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  • Purity: 98.0%
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14255-87-9

14255-87-9 structure
14255-87-9 structure

Name Parbendazole
Synonyms methyl5-butyl-2-benzimidazolecarbamate
SKandF 29044
TCMDC-131798
Methyl (5-butyl-1H-benzimidazol-2-yl)carbamate
Carbamic acid, N-(5-butyl-1H-benzimidazol-2-yl)-, methyl ester
EINECS 238-133-3
SK&F 29044
5-butyl-2-benzimidazolecarbamicacimethylester
Methyl (5-butyl-1H-benzoimidazol-2-yl)carbamate
helmatac
pbdz
Methyl (5-butyl-1H-benzo[d]imidazol-2-yl)carbamate
Parbendazole
verminum
Description Parbendazole is a potent inhibitor of microtubule assembly, destabilizes tubulin, with an EC50 of 8.79 nM, and exhibits a broad-spectrum anthelmintic activity.
Related Catalog
Target

EC50: 8.79 nM (tubulin)[1]

In Vitro Parbendazole is a tubulin destabilizer, with an EC50 of 8.79 nM, and can induce DNA damage[1]. Parbendazole (2-10 μM) inhibits the assembly of microtubules dose-dependently, with an IC50 of 3 μM. Parbendazole (2-20 μM)-treated cells show an complete absence of microtubules in Vero cells[2]. Parbendazole (up to 10 μM) inhibits the growth of CLd-AXE myxamoebae. Parbendazole (2-5 μM) potently inhibits tubulin purified from the wild-type myxamoebae[3].
Kinase Assay Pure tubulin is obtained from sheep brain by 2 cycles of assembly and disassembly in vitro. Immediately prior to use the protein is centrifuged at 130000 g for 30 min to remove any aggregates. It is used at a protein concentration of 0-2 mg/mL in 0.025 M Pipes buffer, 0-5 mM EGTA, 0-25 mM Mg2SOsup>4, 0.1 mM GTP. Drug binding is determined by equilibrium dialysis using concentrations of parbendazole between 0.1 μM and 4 μM, and 2% (v/v) DMF (dimethyl formamide) as a carrier. Equilibrium is achieved by constant stirring for 2 h at 26°C, bovine serum albumin being used as a standard. 200 μL aliquots are counted in PCS in a 25-200B liquid scintillation counter[2].
Cell Assay Vero cells, an established cell line derived from monkey kidney are seeded in DMEM supplemented with 10% (v/v) foetal calf serum onto glass coverslips in multiwell dishes. They are allowed to settle, and spread for 2-5 h in a humid atmosphere at 37°C. After this time the medium is changed to DMEM containing 2, 10 or 20 μM parbendazole and 1% (v/v) DMSO controls contained 1 % (v/v) DMSO or had no additions[2].
References

[1]. Lo YC, et al. Computational Cell Cycle Profiling of Cancer Cells for Prioritizing FDA-Approved Drugs with Repurposing Potential. Sci Rep. 2017 Sep 12;7(1):11261.

[2]. Lo YC, et al. Computational Cell Cycle Profiling of Cancer Cells for Prioritizing FDA-Approved Drugs with Repurposing Potential. Sci Rep. 2017 Sep 12;7(1):11261.

[3]. Havercroft JC, et al. Binding of parbendazole to tubulin and its influence on microtubules in tissue-culture cells as revealed by immunofluorescence microscopy. J Cell Sci. 1981 Jun;49:195-204.

[4]. Havercroft JC, et al. Binding of parbendazole to tubulin and its influence on microtubules in tissue-culture cells as revealed by immunofluorescence microscopy. J Cell Sci. 1981 Jun;49:195-204.

[5]. Foster KE, et al. A mutant beta-tubulin confers resistance to the action of benzimidazole-carbamate microtubule inhibitors both in vivo and in vitro. Eur J Biochem. 1987 Mar 16;163(3):449-55.

[6]. Foster KE, et al. A mutant beta-tubulin confers resistance to the action of benzimidazole-carbamate microtubule inhibitors both in vivo and in vitro. Eur J Biochem. 1987 Mar 16;163(3):449-55.

Density 1.2±0.1 g/cm3
Melting Point 255-257°C
Molecular Formula C13H17N3O2
Molecular Weight 247.293
Exact Mass 247.132080
PSA 67.01000
LogP 3.57
Index of Refraction 1.632
Stability Stable. Incompatible with strong oxidizing agents.
Water Solubility <0.1 g/100 mL at 18 ºC

SECTION 1: Identification of the substance/mixture and of the company/undertaking
Product identifiers
Product name: Parbendazole
REACH No.: A registration number is not available for this substance as the substance
or its uses are exempted from registration, the annual tonnage does not
require a registration or the registration is envisaged for a later
registration deadline.
CAS-No.: 14255-87-9
Relevant identified uses of the substance or mixture and uses advised against
Identified uses: Laboratory chemicals, Manufacture of substances



SECTION 2: Hazards identification
Classification of the substance or mixture
Classification according to Regulation (EC) No 1272/2008
Acute toxicity, Oral (Category 4), H302
Reproductive toxicity (Category 2), H361
For the full text of the H-Statements mentioned in this Section, see Section 16.
Classification according to EU Directives 67/548/EEC or 1999/45/EC
Xn HarmfulR22, R63
For the full text of the R-phrases mentioned in this Section, see Section 16.
Label elements
Labelling according Regulation (EC) No 1272/2008
Pictogram
Signal wordWarning
Hazard statement(s)
H302Harmful if swallowed.
H361Suspected of damaging fertility or the unborn child.
Precautionary statement(s)
P281Use personal protective equipment as required.
Supplemental Hazardnone
Statements
Other hazards - none

SECTION 3: Composition/information on ingredients
Substances
Synonyms: Methyl (5-butyl-1H-benzoimidazol-2-yl)carbamate
Methyl 5(6)-butyl-2-benzimidazolecarbamate
Formula: C13H17N3O2
Molecular Weight: 247,29 g/mol
CAS-No.: 14255-87-9
EC-No.: 238-133-3
Hazardous ingredients according to Regulation (EC) No 1272/2008
ComponentClassificationConcentration
Parbendazole
Acute Tox. 4; Repr. 2; H302, -
H361
Hazardous ingredients according to Directive 1999/45/EC
ComponentClassificationConcentration
Parbendazole
Xn, R22 - R63-
For the full text of the H-Statements and R-Phrases mentioned in this Section, see Section 16

SECTION 4: First aid measures
Description of 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
Flush eyes with water as a precaution.
If swallowed
Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.
Most important symptoms and effects, both acute and delayed
The most important known symptoms and effects are described in the labelling (see section 2.2) and/or in
section 11
Indication of any immediate medical attention and special treatment needed
no data available

SECTION 5: Firefighting measures
Extinguishing media
Suitable extinguishing media
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Carbon oxides, nitrogen oxides (NOx)
Advice for firefighters
Wear self contained breathing apparatus for fire fighting if necessary.
Further information
no data available

SECTION 6: Accidental release measures
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.
Environmental precautions
Prevent further leakage or spillage if safe to do so. Do not let product enter drains.
Methods and materials for containment and cleaning up
Pick up and arrange disposal without creating dust. Sweep up and shovel. Keep in suitable, closed
containers for disposal.
Reference to other sections
For disposal see section 13.

SECTION 7: Handling and storage
Precautions for safe handling
Avoid contact with skin and eyes. Avoid formation of dust and aerosols.
Provide appropriate exhaust ventilation at places where dust is formed.
For precautions see section 2.2.
Conditions for safe storage, including any incompatibilities
Store in cool place. Keep container tightly closed in a dry and well-ventilated place.
Recommended storage temperature: 2 - 8 °C
Specific end use(s)
A part from the uses mentioned in section 1.2 no other specific uses are stipulated

SECTION 8: Exposure controls/personal protection
Control parameters
Components with workplace control parameters
Exposure controls
Appropriate engineering controls
Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and
at the end of workday.
Personal protective equipment
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
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.
Body Protection
Complete suit protecting against chemicals, The type of protective equipment must be selected
according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection
Where risk assessment shows air-purifying respirators are appropriate use a full-face particle
respirator type N100 (US) or type P3 (EN 143) respirator cartridges as a backup to engineering
controls. If the respirator is the sole means of protection, use a full-face supplied air respirator. Use
respirators and components tested and approved under appropriate government standards such
as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so. Do not let product enter drains.

SECTION 9: Physical and chemical properties
Information on basic physical and chemical properties
a) AppearanceForm: powder
Colour: white
b) Odourodourless
c) Odour Thresholdno data available
d) pHno data available
e) Melting point/freezing255 - 257 °C - lit. - Decomposes on heating.
point
f) Initial boiling point and no data available
boiling range
g) Flash pointno data available
h) Evapouration rateno data available
i) Flammability (solid, gas) no data available
j) Upper/lowerno data available
flammability or
explosive limits
k) Vapour pressureno data available
l) Vapour densityno data available
m) Relative densityno data available
n) Water solubility0,01 g/l at 18 °C
o) Partition coefficient: n- log Pow: 3,43
octanol/water
p) Auto-ignitionno data available
temperature
q) Decompositionno data available
temperature
r) Viscosityno data available
s) Explosive propertiesno data available
t) Oxidizing propertiesno data available
Other safety information
no data available

SECTION 10: Stability and reactivity
Reactivity
no data available
Chemical stability
Stable under recommended storage conditions.
Possibility of hazardous reactions
no data available
Conditions to avoid
no data available
Incompatible materials
Strong oxidizing agents
Hazardous decomposition products
Other decomposition products - no data available
In the event of fire: see section 5

SECTION 11: Toxicological information
Information on toxicological effects
Acute toxicity
LD50 Oral - rat - > 40 mg/kg
LD50 Oral - mouse - 1.700 mg/kg
Skin corrosion/irritation
no data available
Serious eye damage/eye irritation
no data available
Respiratory or skin sensitisation
no data available
Germ cell mutagenicity
no data available
Carcinogenicity
IARC:No component of this product present at levels greater than or equal to 0.1% is identified as
probable, possible or confirmed human carcinogen by IARC.
Reproductive toxicity
Laboratory experiments have shown teratogenic effects.
Reproductive toxicity - rat - Oral
Effects on Embryo or Fetus: Fetal death. Specific Developmental Abnormalities: Central nervous system.
Specific Developmental Abnormalities: Craniofacial (including nose and tongue).
Specific target organ toxicity - single exposure
no data available
Specific target organ toxicity - repeated exposure
no data available
Aspiration hazard
no data available
Additional Information
RTECS: DD6495000
To the best of our knowledge, the chemical, physical, and toxicological properties have not been
thoroughly investigated.

SECTION 12: Ecological information
Toxicity
no data available
Persistence and degradability
no data available
Bioaccumulative potential
no data available
Mobility in soil
no data available
Results of PBT and vPvB assessment
PBT/vPvB assessment not available as chemical safety assessment not required/not conducted
Other adverse effects
no data available

SECTION 13: Disposal considerations
Waste treatment methods
Product
Offer surplus and non-recyclable solutions to a licensed disposal company. Dissolve or mix the material
with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber.
Contaminated packaging
Dispose of as unused product.

SECTION 14: Transport information
UN number
ADR/RID: -IMDG: -IATA: -
UN proper shipping name
ADR/RID: Not dangerous goods
IMDG: Not dangerous goods
IATA:Not dangerous goods
Transport hazard class(es)
ADR/RID: -IMDG: -IATA: -
Packaging group
ADR/RID: -IMDG: -IATA: -
Environmental hazards
ADR/RID: noIMDG Marine pollutant: noIATA: no
Special precautions for user
no data available

SECTION 15: Regulatory information
This safety datasheet complies with the requirements of Regulation (EC) No. 1907/2006.
Safety, health and environmental regulations/legislation specific for the substance or mixture
no data available
Chemical Safety Assessment
For this product a chemical safety assessment was not carried out

SECTION 16: Other information
Full text of H-Statements referred to under sections 2 and 3.
Acute Tox.Acute toxicity
H302Harmful if swallowed.
H361Suspected of damaging fertility or the unborn child.
Repr.Reproductive toxicity
Full text of R-phrases referred to under sections 2 and 3
XnHarmful
R22Harmful if swallowed.
R63Possible risk of harm to the unborn child.
Further information
Copyright 2013 Co. LLC. License granted to make unlimited paper copies for internal use
only.
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. Corporation and its Affiliates shall not be held
liable for any damage resulting from handling or from contact with the above product. See
and/or the reverse side of invoice or packing slip for additional terms and conditions of sale.

CHEMICAL IDENTIFICATION

RTECS NUMBER :
DD6495000
CHEMICAL NAME :
2-Benzimidazolecarbamic acid, 5-butyl-, methyl ester
CAS REGISTRY NUMBER :
14255-87-9
LAST UPDATED :
199306
DATA ITEMS CITED :
23
MOLECULAR FORMULA :
C13-H17-N3-O2
MOLECULAR WEIGHT :
247.33
WISWESSER LINE NOTATION :
T56 BM DNJ CMVO1 G4

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
>40 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 :
1700 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 :
Bird - chicken
DOSE/DURATION :
>40 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 :
Mammal - domestic
DOSE/DURATION :
660 mg/kg
TOXIC EFFECTS :
Gastrointestinal - ulceration or bleeding from stomach
TYPE OF TEST :
LD - Lethal dose
ROUTE OF EXPOSURE :
Unreported
SPECIES OBSERVED :
Mammal - cattle
DOSE/DURATION :
>1200 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 :
Unreported
SPECIES OBSERVED :
Mammal - cattle
DOSE/DURATION :
450 mg/kg/6D-I
TOXIC EFFECTS :
Gastrointestinal - other changes
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
1200 mg/kg
SEX/DURATION :
female 7-18 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - gastrointestinal system
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
80 mg/kg
SEX/DURATION :
female 8-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Embryo or Fetus - fetal death Reproductive - Specific Developmental Abnormalities - Central Nervous System Reproductive - Specific Developmental Abnormalities - craniofacial (including nose and tongue)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
80 mg/kg
SEX/DURATION :
female 8-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - musculoskeletal system
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
150 mg/kg
SEX/DURATION :
female 8-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death, e.g., stunted fetus) Reproductive - Specific Developmental Abnormalities - other developmental abnormalities
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
80 mg/kg
SEX/DURATION :
female 8-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - post-implantation mortality (e.g. dead and/or resorbed implants per total number of implants)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
4 gm/kg
SEX/DURATION :
female 6-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - respiratory system
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
90 mg/kg
SEX/DURATION :
female 13 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - musculoskeletal system
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
400 mg/kg
SEX/DURATION :
female 6-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - post-implantation mortality (e.g. dead and/or resorbed implants per total number of implants) Reproductive - Specific Developmental Abnormalities - other developmental abnormalities
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
10 gm/kg
SEX/DURATION :
female 6-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - Central Nervous System Reproductive - Specific Developmental Abnormalities - musculoskeletal system
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
16 gm/kg
SEX/DURATION :
female 6-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - post-implantation mortality (e.g. dead and/or resorbed implants per total number of implants) Reproductive - Specific Developmental Abnormalities - urogenital system
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
130 mg/kg
SEX/DURATION :
female 6-18 day(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - abortion Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death, e.g., stunted fetus)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
780 mg/kg
SEX/DURATION :
female 6-18 day(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - post-implantation mortality (e.g. dead and/or resorbed implants per total number of implants) Reproductive - Fertility - litter size (e.g. # fetuses per litter; measured before birth)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
60 mg/kg
SEX/DURATION :
female 21 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - musculoskeletal system Reproductive - Effects on Newborn - physical
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
30 mg/kg
SEX/DURATION :
female 12 day(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - other measures of fertility

MUTATION DATA

TYPE OF TEST :
Mutation test systems - not otherwise specified
TEST SYSTEM :
Mammal - domestic Leukocyte
DOSE/DURATION :
1 mg/L
REFERENCE :
THERAP Therapie. (Doin, Editeurs, 8, Place de l'Odeon, F-75006 Paris, France) V.1- 1946- Volume(issue)/page/year: 31,505,1976
Symbol GHS07 GHS08
GHS07, GHS08
Signal Word Warning
Hazard Statements H302-H361
Precautionary Statements P280-P301 + P312 + P330
Hazard Codes Xn
Risk Phrases R20/21/22:Harmful by inhalation, in contact with skin and if swallowed . R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Phrases S26-S36/37/39
RIDADR 2811
RTECS DD6495000
HS Code 2933990090
HS Code 2933990090
Summary 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%