Chemical Safety Data Sheet MSDS / SDS
Paclobutrazol
Revision Date:2026-03-20Revision Number:1
Product identifier
- Product name: Paclobutrazol
- CBnumber: CB5117602
- CAS: 76738-62-0
- EINECS Number: 616-379-6
- Synonyms: 2RS, 3RS)-1-(4-chlorophenyl )-4, 4-dimethyl-2-(1H-1, 2, 4-triazole-1-yl)-amylalcohol–3
Relevant identified uses of the substance or mixture and uses advised against
- Relevant identified uses: For R&D use only. Not for medicinal, household or other use.
- Uses advised against: none
Company Identification
- Company: Chemicalbook
- Address: Building 1, Huihuang International, Shangdi 10th Street, Haidian District, Beijing
- Telephone: 010-86108875
GHS Label elements, including precautionary statements
-
Symbol(GHS)
- Signal wordDanger
P308+P313 IF exposed or concerned: Get medical advice/attention.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P273 Avoid release to the environment.
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
Hazard statements
H410 Very toxic to aquatic life with long lasting effects
H319 Causes serious eye irritation
H228 Flammable solid
Substance
- Product name: Paclobutrazol
- Synonyms: 2RS, 3RS)-1-(4-chlorophenyl )-4, 4-dimethyl-2-(1H-1, 2, 4-triazole-1-yl)-amylalcohol–3
- CAS: 76738-62-0
- EC number: 616-379-6
- MF: C15H20ClN3O
- MW: 293.8
Description of first aid measures
General information
Symptoms of poisoning may even occur after several hours; therefore medical observation for at least 48 hours after the accident.
After inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm. Consult doctor if symptoms persist.
In case of unconsciousness place patient stably in side position for transportation.
In case of unconsciousness place patient stably in side position for transportation.
After skin contact
Generally the product does not irritate the skin.
After eye contact
Rinse opened eye for several minutes under running water. If symptoms persist, consult a doctor.
After swallowing
Immediately call a doctor.
Information for doctor
Most important symptoms and effects, both acute and delayed
May cause anemia, cough, CNS depression, drowsiness, headache, heart damage, lassitude (weakness, exhaustion), liver damage, narcosis, reproductive effects, teratogenic effects.
No further relevant information available.
No further relevant information available.
Indication of any immediate medical attention and special treatment needed
No further relevant information available.
Extinguishing media
Suitable extinguishing agents
Use fire fighting measures that suit the environment.
A solid water stream may be inefficient.
A solid water stream may be inefficient.
Special hazards arising from the substance or mixture
No further relevant information available.
Advice for firefighters
Protective equipment
Mouth respiratory protective device.
NFPA 704
2
0
0
| HEALTH | 2 | Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury (e.g. diethyl ether, ammonium phosphate, iodine) | |
| FIRE | 0 | Materials that will not burn under typical fire conditions, including intrinsically noncombustible materials such as concrete, stone, and sand. Materials that will not burn in air when exposed to a temperature of 820 °C (1,500 °F) for a period of 5 minutes.(e.g. Carbon tetrachloride) | |
| REACT | 0 | Normally stable, even under fire exposure conditions, and is not reactive with water (e.g. helium,N2) | |
| SPEC. HAZ. |
Personal precautions, protective equipment and emergency procedures
Wear protective equipment. Keep unprotected persons away.
Environmental precautions
Inform respective authorities in case of seepage into water course or sewage system.
Do not allow to enter sewers/ surface or ground water.
Do not allow to enter sewers/ surface or ground water.
Methods and material for containment and cleaning up
Dispose contaminated material as waste according to item 13.
Ensure adequate ventilation.
Ensure adequate ventilation.
Reference to other sections
See Section 7 for information on safe handling.
See Section 8 for information on personal protection equipment.
See Section 13 for disposal information.
See Section 8 for information on personal protection equipment.
See Section 13 for disposal information.
Protective Action Criteria for Chemicals
PAC-1
Substance is not listed.
PAC-2
Substance is not listed.
PAC-3
Substance is not listed.
Handling
Precautions for safe handling
Thorough dedusting.
Ensure good ventilation/exhaustion at the workplace.
Ensure good ventilation/exhaustion at the workplace.
Information about protection against explosions and fires
Keep ignition sources away - Do not smoke.
Conditions for safe storage, including any incompatibilities
Storage
Store in accordance with information listed on the product insert.
Requirements to be met by storerooms and receptacles
No special requirements.
Information about storage in one common storage facility
Not required.
Further information about storage conditions
Keep receptacle tightly sealed.
Specific end use(s)
No further relevant information available.
Additional information about design of technical systems
No further data; see item 7.
Control parameters
Components with limit values that require monitoring at the workplace
Not required.
Additional information
The lists that were valid during the creation were used as basis.
Exposure controls
Personal protective equipment
General protective and hygienic measures
Keep away from foodstuffs, beverages and feed.
Immediately remove all soiled and contaminated clothing.
Wash hands before breaks and at the end of work.
Avoid contact with the eyes.
Avoid contact with the eyes and skin.
Immediately remove all soiled and contaminated clothing.
Wash hands before breaks and at the end of work.
Avoid contact with the eyes.
Avoid contact with the eyes and skin.
Breathing equipment
In case of brief exposure or low pollution use respiratory filter device. In case of intensive or longer exposure use respiratory protective device that is independent of circulating air.
Protection of hands
The glove material has to be impermeable and resistant to the product/ the substance/ the preparation.
Due to missing tests no recommendation to the glove material can be given for the product/ the preparation/ the chemical mixture.
Selection of the glove material on consideration of the penetration times, rates of diffusion and the degradation
Due to missing tests no recommendation to the glove material can be given for the product/ the preparation/ the chemical mixture.
Selection of the glove material on consideration of the penetration times, rates of diffusion and the degradation
Material of gloves
The selection of the suitable gloves does not only depend on the material, but also on further marks of quality and varies from manufacturer to manufacturer.
Penetration time of glove material
The exact break through time has to be found out by the manufacturer of the protective gloves and has to be observed.
Eye protection
Tightly sealed goggles
Information on basic physicochemical properties
- Other informationNo information available
- KinematicNot applicable.
- DynamicNot applicable.
- Partition coefficient (n-octanol/water)Not determined.
- WaterNot determined.
- Solubility in / Miscibility withDMF: 10 mg/ml,DMSO: 10 mg/ml,Ethanol: 10 mg/ml,Ethanol:PBS(pH 7.2) (1:1): 0.5 mg/ml
- Evaporation RateNot applicable.
- Vapor DensityNot applicable.
- Relative Density1.22
- Density1.22
- Vapor PressureNot applicable.
- Explosion limitsLower: Not determined.
Upper: Not determined. - Danger of explosionNot determined.
- Auto ignitingNot determined.
- Decomposition temperatureNot determined.
- Flammability (solid,gas)Product is not flammable.
- Flash pointNot applicable.
- Boiling point/Boiling range460.9±55.0 °C(Predicted)
- Melting point/Melting rangeUndetermined.
- pHNot applicable.
- Odor ThresholdNot determined.
- Molecular Weight293.8 g/mol
- Structural FormulaC15H20ClN3O
- OdorCharacteristic
- ColorWhite to Almost white
- Physical StateSolid
Reactivity
No further relevant information available.
Chemical stability
Thermal decomposition / conditions to be avoided
No decomposition if used according to specifications.
Possibility of hazardous reactions
No dangerous reactions known.
Conditions to avoid
No further relevant information available.
Incompatible materials
No further relevant information available.
Hazardous decomposition products
No dangerous decomposition products known.
Information on toxicological effects
Acute toxicity
LD/LC50 values that are relevant for classification:
| Route | Endpoint | Value |
|---|---|---|
| Oral | LD50 | 490 mg/kg (ATE) 1,300 mg/kg (rat) |
| Inhalative | LC50/4 h | 3.13 mg/l (ATE) |
Primary irritant effect
on the skin
No irritant effect.
on the eye
Irritating effect.
Sensitization
No sensitizing effects known.
Additional toxicological information
Carcinogenic categories
IARC (International Agency for Research on Cancer)
Substance is not listed.
NTP (National Toxicology Program)
Substance is not listed.
OSHA-Ca (Occupational Safety & Health Administration)
Substance is not listed.
Toxicity
Aquatic toxicity
No further relevant information available.
Persistence and degradability
No further relevant information available.
Behavior in environmental systems
Bioaccumulative potential
No further relevant information available.
Mobility in soil
No further relevant information available.
Ecotoxical effects
Remark
Very toxic for fish
Additional ecological information
General notes
Water hazard class 3 (Self-assessment) extremely hazardous for water
Do not allow product to reach ground water, water course or sewage system, even in small quantities.
Danger to drinking water if even extremely small quantities leak into the ground.
Also poisonous for fish and plankton in water bodies.
Very toxic for aquatic organisms
Do not allow product to reach ground water, water course or sewage system, even in small quantities.
Danger to drinking water if even extremely small quantities leak into the ground.
Also poisonous for fish and plankton in water bodies.
Very toxic for aquatic organisms
Results of PBT and vPvB assessment
PBT
Not applicable.
vPvB
Not applicable.
PBT:
Not applicable.
vPvB:
Not applicable.
Other adverse effects
No further relevant information available.
Waste treatment methods
Recommendation
Must not be disposed of together with household garbage. Do not allow product to reach sewage system.
Uncleaned packagings
Recommendation
Disposal must be made according to official regulations.
UN-Number
DOT, IMDG, IATA UN3077
UN proper shipping name
DOT, IATA Environmentally hazardous substance, solid, n.o.s.
(Paclobutrazol)
IMDG ENVIRONMENTALLY HAZARDOUS SUBSTANCE,
SOLID, N.O.S. (Paclobutrazol)
(Paclobutrazol)
IMDG ENVIRONMENTALLY HAZARDOUS SUBSTANCE,
SOLID, N.O.S. (Paclobutrazol)
Transport hazard class(es)
DOT, IMDGClass: 9 Miscellaneous dangerous substances and articles
Label: 9
IATA
Label: 9
Class: 9 Miscellaneous dangerous substances and articles
Label: 9
Label: 9
Packing group
DOT, IMDG, IATA III
Environmental hazards
Special marking (IATA): Symbol (fish and tree)
Special marking (IATA)
Symbol (fish and tree)
Special precautions for user
Warning: Miscellaneous dangerous substances and articles
Hazard identification number (Kemler code)
90
EMS Number
F-A,S-F
Stowage Category
A
Stowage Code
SW23 When transported in BK3 bulk container, see
Transport in bulk according to Annex II of MARPOL73/78 and the IBC Code
Not applicable.
Transport/Additional information
DOT:
Quantity limitations
On passenger aircraft/rail: 400 kg
On cargo aircraft only: 400 kg
On cargo aircraft only: 400 kg
IMDG:
Limited quantities (LQ)
5 kg
Excepted quantities (EQ)
Code: E1
Maximum net quantity per inner packaging: 30 g
Maximum net quantity per outer packaging: 1000 g
Maximum net quantity per inner packaging: 30 g
Maximum net quantity per outer packaging: 1000 g
IATA:
Remarks
When sold in quantities of less than or equal to 1 mL, or 1 g, with an Excepted Quantity Code of
E1, E2, E4, or E5, this item meets the De Minimis
Quantities exemption, per IATA 2.6.10.
Therefore packaging does not have to be labeled as
Dangerous Goods/Excepted Quantity.
E1, E2, E4, or E5, this item meets the De Minimis
Quantities exemption, per IATA 2.6.10.
Therefore packaging does not have to be labeled as
Dangerous Goods/Excepted Quantity.
UN "Model Regulation"
UN 3077 ENVIRONMENTALLY HAZARDOUS
SUBSTANCE, SOLID, N.O.S. (PACLOBUTRAZOL), 9, III
SUBSTANCE, SOLID, N.O.S. (PACLOBUTRAZOL), 9, III
Safety, health and environmental regulations/legislation specific for the substance or mixture
No further relevant information available.
Sara
| Section 355 (extremely hazardous substances): | Substance is not listed. |
| Section 313 (Specific toxic chemical listings): | Substance is not listed. |
| TSCA (Toxic Substances Control Act): | Substance is not listed. |
| Hazardous Air Pollutants: | Substance is not listed. |
Proposition 65
| Chemicals known to cause cancer: | Substance is not listed. |
| Chemicals known to cause reproductive toxicity for females: | Substance is not listed. |
| Chemicals known to cause reproductive toxicity for males: | Substance is not listed. |
| Chemicals known to cause developmental toxicity: | Substance is not listed. |
Chemicals known to cause cancer
Substance is not listed.
Chemicals known to cause reproductive toxicity for females
Substance is not listed.
Chemicals known to cause reproductive toxicity for males
Substance is not listed.
Chemicals known to cause developmental toxicity
Substance is not listed.
Carcinogenic categories
| EPA (Environmental Protection Agency): | Substance is not listed. |
TLV (Threshold Limit Value)
Substance is not listed.
NIOSH-Ca (National Institute for Occupational Safety and Health)
Substance is not listed.
Chemical safety assessment
A Chemical Safety Assessment has not been carried out.
Abbreviations and acronyms
IMDG: International Maritime Code for Dangerous Goods
DOT: US Department of Transportation
IATA: International Air Transport Association
CAS: Chemical Abstracts Service (division of the American Chemical Society)
NFPA: National Fire Protection Association (USA)
HMIS: Hazardous Materials Identification System (USA)
LC50: Lethal concentration, 50 percent
LD50: Lethal dose, 50 percent
PBT: Persistent, Bioaccumulative and Toxic vPvB: very Persistent and very Bioaccumulative
NIOSH: National Institute for Occupational Safety
OSHA: Occupational Safety & Health
TLV: Threshold Limit Value
PEL: Permissible Exposure Limit
REL: Recommended Exposure Limit
Flam. Sol. 1: Flammable solids – Category 1
Acute Tox. 4: Acute toxicity – Category 4
Eye Irrit. 2A: Serious eye damage/eye irritation – Category 2A
Repr. 2: Reproductive toxicity – Category 2
Aquatic Acute 1: Hazardous to the aquatic environment - acute aquatic hazard – Category 1
Aquatic Chronic 1: Hazardous to the aquatic environment - long-term aquatic hazard – Category 1
DOT: US Department of Transportation
IATA: International Air Transport Association
CAS: Chemical Abstracts Service (division of the American Chemical Society)
NFPA: National Fire Protection Association (USA)
HMIS: Hazardous Materials Identification System (USA)
LC50: Lethal concentration, 50 percent
LD50: Lethal dose, 50 percent
PBT: Persistent, Bioaccumulative and Toxic vPvB: very Persistent and very Bioaccumulative
NIOSH: National Institute for Occupational Safety
OSHA: Occupational Safety & Health
TLV: Threshold Limit Value
PEL: Permissible Exposure Limit
REL: Recommended Exposure Limit
Flam. Sol. 1: Flammable solids – Category 1
Acute Tox. 4: Acute toxicity – Category 4
Eye Irrit. 2A: Serious eye damage/eye irritation – Category 2A
Repr. 2: Reproductive toxicity – Category 2
Aquatic Acute 1: Hazardous to the aquatic environment - acute aquatic hazard – Category 1
Aquatic Chronic 1: Hazardous to the aquatic environment - long-term aquatic hazard – Category 1
Disclaimer:
The information in this MSDS is only applicable to the specified product, unless otherwise specified, it is not applicable to the mixture of this product and other substances. This MSDS only provides information on the safety of the product for those who have received the appropriate professional training for the user of the product. Users of this MSDS must make independent judgments on the applicability of this SDS. The authors of this MSDS will not be held responsible for any harm caused by the use of this MSDS.