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N-Acetyl-L-cysteine,JUNSEI CHEMICAL CO., LTD.,11046jis_E-2,18/Mar/2024
Date of issue for the 1st edition : 13/May/2019
Date of revision : 18/Mar/2024

Safety Data Sheet

Section 1. Identification of the substance/mixture and of the company/undertaking
Product identifier:Product name: N-Acetyl-L-cysteine
Reference number(SDS):11046jis_E-2
Product type：
Quasi-drug raw materials for Japan only※This product conform to JSQI (Japanese Standards of Quasi-drug Ingredients).
Relevant identified uses of the substance or mixture and uses advised against
Relevant identified uses of the product: Antioxidant
Uses advised against: Do not use for other purposes.
Details of the supplier of the safety data sheet
Manufacturer/Supplier: JUNSEI CHEMICAL CO., LTD.
Address: 1-6, Ohmano-cho, Koshigaya-shi, Saitama 343-0844, Japan
Division: Quality Assurance Department
Telephone number: +81-48-986-6161
FAX: +81-48-989-2787
e-mail address: shiyaku-t@junsei.co.jp

Section 2. Hazards identification
GHS classification and label elements of the product
Classification of the substance or mixture
Label elements
No GHS label element
No Signal wordSection 3. Composition/information on ingredients
Mixture/Substance selection:SubstanceCommon name, synonyms: Acetylcysteine
Ingredient name:N‐Acetyl‐L‐cysteine
Content (%):(Dried) 98.0 <Chemical formula:C5H9NO3S
Chemicals No, Japan:2-2757
CAS No.:616-91-1
MW:163.19
ECNO:210-498-3

Section 4. First-aid measures
Descriptions of first-aid measures
IF INHALED
Remove person to fresh air and keep comfortable for breathing.
Call a POISON CENTER/doctor/physician if you feel unwell.
IF ON SKIN (or hair）
Take off immediately all contaminated clothing. Rinse skin with water or shower.
If skin irritation or rash occurs: Get medical advice/attention.

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N-Acetyl-L-cysteine,JUNSEI CHEMICAL CO., LTD.,11046jis_E-2,18/Mar/2024
IF IN EYES
Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy
to do. Continue rinsing.
If eye irritation persists: Get medical advice/attention.
IF SWALLOWED
Rinse mouth.
Call a POISON CENTER/doctor/physician if you feel unwell.
Most important symptoms and effects, both acute and delayedSpecific information on symptom and effect are unknown.
Indication of any immediate medical attention and special treatment needed
Information on indication of any immediate medical attention and special treatment needed
is not available.

Section 5. Fire-fighting measures
Extinguishing media
Suitable extinguishing media
Use appropriate extinguishing media suitable for surrounding facilities.
Unsuitable extinguishing media
Unsuitable extinguishing media data is not available.
Specific hazards arising from the substance or mixture
Containers may explode when heated.
Fire may produce irritating, corrosive and/or toxic gases.
Advice for firefighters
Specific fire-fighting measuresEvacuate non-essential personnel to safe area.
Special protective equipment and precautions for fire-fighters
Wear fire resistant or flame retardant clothing.
Wear protective gloves/protective clothing/eye protection/face protection.
Firefighters should wear self-contained breathing apparatus with a full facepiece operated
in the positive pressure mode.

Section 6. Accidental release measures
Personnel precautions, protective equipment and emergency procedures
Ventilate area until material pick up is complete.
Wear proper protective equipment.
Environmental precautions
Avoid release to headsprings, rivers, lakes, ocean and groundwater.
Methods and materials for containment and cleaning up
Sweep up, place in a bag and hold for waste disposal.
Preventive measures for secondary accident
Collect spillage.

Section 7. Handling and storage
Precautions for safe handling
Preventive measures(Exposure Control for handling personnel)
Avoid breathing dust/fume/gas/mist/vapors/spray.
(Protective measures against fire and explosion)
Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
(Exhaust/ventilator)
Exhaust/ventilator should be available.

3/8N-Acetyl-L-cysteine,JUNSEI CHEMICAL CO., LTD.,11046jis_E-2,18/Mar/2024(Safety treatments)
Avoid contact with skin.
Avoid contact with eyes.
Safety Measures
Wear protective gloves/protective clothing/eye protection/face protection.
Use personal protective equipment as required.
When using do not eat, drink or smoke.
Any incompatibilities
Strong oxidizing agents should not be mixed with the chemicals.
Storage
Conditions for safe storage
Store in a well-ventilated place.
Keep container tightly closed.
Keep cool. Protect from sunlight.
Store in accordance with local/national regulation.
Storage temperature upper limit: 10℃
Storage temperature lower limit: 2℃
Container and packaging materials for safe handling data is not available.
Specific end use(s)See information in Section 7.1 and 7.2 for handling and storage recommendations. See
Section 8 for exposure controls and personal protection recommendations.

Section 8. Exposure controls/personal protection
Control parameters
Control value and concentration standard value are not available in ISHA.
Adopted value
Adopted value in JSOH is not available.
Adopted value in ACGIH is not available.
Exposure controls
Appropriate engineering controls
Do not use in areas without adequate ventilation.
Eye wash station should be available.
Washing facilities should be available.
Individual protection measures
Respiratory protection
Wear respiratory protection.
Recommended respiratory protection：Dust mask(e.g. JIS T8151)
Hand protection
Wear protective gloves.
Inspect before use and replace worn or damaged gloves.
Contact the glove manufacturer for specific advice on glove selection and breakthroughtimes for your use conditions.
Chemical-resistant, impervious gloves complying with an approved standard (e.g. JIS T8116)
should be used.
Eye protection
Wear eye/face protection.
Skin and body protection
Wear impervious clothing and boots in case of repeated or prolonged treatment.
Personal protective equipment for the body and skin should be selected based on the task
being performed and the risks involved.

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N-Acetyl-L-cysteine,JUNSEI CHEMICAL CO., LTD.,11046jis_E-2,18/Mar/2024
Section 9. Physical and Chemical Properties
Information on basic physical and chemical properties
Physical state: Crystalline powder
Color: White
Odor: Slight characteristic odor
Odor threshold data is not available.
Melting point/Freezing point: 109～110℃
Boiling point or initial boiling point data is not available.
Boiling range data is not available.
Flammability (gases, liquids and solids) data is not available.
Lower and upper explosion limit/flammability limit data is not available.
Flash point data is not available.
Auto-ignition temperature data is not available.
Decomposition temperature data is not available.
Self-Accelerating Decomposition Temperature/SADT data is not available.
pH data is not available.
Dynamic viscosity data is not available.
Kinematic viscosity data is not available.
Solubility:
Solubility in water: Soluble179.5g/liter(20℃)
Solubility in solvent: Soluble in alcohol and ethyl acetat ; Practically insoluble in chloroform
and ether.
n-Octanol/water partition coefficient: log Pow-0.6(23℃)
Vapor pressure data is not available.
Density and/or relative density: 1.48g/cm3(20℃)
Relative vapor density (Air=1) data is not available.
Relative density of the Vapor/air - mixture at 20℃ (Air = 1) data is not available.
Particle characteristics data is not available.
Other information
Critical temperature data is not available.
Evaporation rate data is not available.
VOC data is not available.

Section 10. Stability and Reactivity
Reactivity
Reactivity data is not available.
Chemical stability
Stable under normal storage/handling conditions.
Possibility of hazardous reactions
Possibility of hazardous reactions data is not available.
Conditions to avoid
Contact with incompatible materials.
Open flames. Heating.
Incompatible materials
Strong oxidizing agents
Hazardous decomposition products
Carbon oxides, Nitrogen oxides, Sulfur oxides

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Section 11. Toxicological Information
Information on toxicological effects
Acute toxicity
Acute toxicity (Oral)[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
rat LD50 >6000mg/kg (HSDB; REACH Registration dossier)Acute toxicity (Dermal)[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
Acute toxicity (Inhalation)[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
Irritant properties
Skin corrosion/irritation[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
Serious eye damage/irritation[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
Sensitization
Respiratory sensitization[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
Skin sensitization[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
Germ cell mutagenicity[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
Carcinogenicity[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
Reproductive toxicity[Product]Classification not possible (Insufficient data available or no data available).

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N-Acetyl-L-cysteine,JUNSEI CHEMICAL CO., LTD.,11046jis_E-2,18/Mar/2024[Data for components of the product]
No data available.
Specific target organ toxicity (STOT)
STOT-single exposure[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
STOT-repeated exposure[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.
Aspiration hazard[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
No data available.

Section 12. Ecological Information
Toxicity
Aquatic toxicity[Product]Classification not possible (Insufficient data available or no data available).
[Data for components of the product]
Hazardous to the aquatic environment, short-term (acute)
Crustaceans(Daphnia magna) EC50 >100mg/L/48hr(REACH Registration dossier)
Water solubility[Data for components of the product]
179.5g/L(20℃)(REACH Registration dossier)Persistence and degradability
Persistence and degradability data is not available.
Bioaccumulative potential[Data for components of the product]log Pow=-0.6(23℃)(REACH Registration dossier)Mobility in soil
Mobility in soil data is not available.
Other adverse effects
Ozone depleting chemical data is not available.

Section 13. Disposal considerations
Description of waste residues and information on their safe handling and methods of disposal,
including the disposal of any contaminated packaging
Waste treatment methods
Dispose of contents/container in accordance with local/national regulation.

Section 14. Transport Information
UN No., UN CLASS
UN Number or ID Number : Not regulated
UN Proper Shipping Name : Not regulated
Class or division (Transport hazard class) : Not regulated

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N-Acetyl-L-cysteine,JUNSEI CHEMICAL CO., LTD.,11046jis_E-2,18/Mar/2024
Packing group : Not regulated
IMDG Code (International Maritime Dangerous Goods Regulations)
UN Number or ID Number : Not regulated
UN Proper Shipping Name : Not regulated
Class or division (Transport hazard class) : Not regulated
Packing group : Not regulated
IATA (Dangerous Goods Regulations)
UN Number or ID Number : Not regulated
UN Proper Shipping Name : Not regulated
Class or division (Transport hazard class) : Not regulated
Packing group : Not regulatedEnvironmental hazards
Marine pollutants (yes/no) : noTransport in bulk according to Annex II of MARPOL 73/78 and the IBC CodeNot applicable to Transport in bulk according to Annex II of MARPOL and the IBC Code

Section 15. Regulatory Information
Safety, health and environmental regulations/legislation specific for the substance or mixture
U.S. Toxic Substances Control Act (TSCA) Inventory
Chemicals listed in TSCA Inventory616-91-1
All components are listed or exempted.
Other regulatory information
We are not able to check up the regulatory information with regard to the substances inyour country or region, therefore, we request this matter would be filled by your responsibility.
Regulatory information with regard to this substance in your country or in your region
should be examined by your own responsibility.
Ensure this material in compliance with federal requirements and ensure conformity to local regulations.
Regulatory information in this section are limited to intentional ingredient(s), but does
not contain information on non-intentional ingredients or impurities which are not informed by supplier(s).
Chemical safety assessment
Advice on safe handling for this product can be found in sections 7 and 8 of this SDS.

Section 16. Other information
References and sources for data
Globally Harmonized System of classification and labelling of chemicals, UN
Recommendations on the TRANSPORT OF DANGEROUS GOODS 22nd edit., 2021 UN
IMDG Code, 2020 Edition (Incorporating Amendment 40-20)
IATA Dangerous Goods Regulations (64th Edition) 2023
2020 EMERGENCY RESPONSE GUIDEBOOK (US DOT)
2023 TLVs and BEIs. (ACGIH)
JIS Z 7252 : 2019
JIS Z 7253 : 20192022 Recommendation on TLVs (JSOH)
Notification No. 0111-1 (January 11, 2022), Chemical Hazards Control Division, IndustrialSafety and Health Department, Labour Standards Bureau, MHLW in Japan
Supplier's data/information
Chemicals safety data management system "GHS Assistant" Version 4.26 (https://www.asahi-ghs.com/)
NITE Chemical Risk Information Platform "NITE-CHRIP"(https://www.nite.go.jp/en/chem/chrip/chrip_search/systemTop)
GHS Classification Guidance for Enterprises 2019 Revised Edition (Ver. 2.0) （Mar. 2020, METI)

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N-Acetyl-L-cysteine,JUNSEI CHEMICAL CO., LTD.,11046jis_E-2,18/Mar/2024
Abbreviations and acronyms
SDS (Safety Data Sheet)
LD50 (Lethal Dose, 50％)
LC50 (Lethal Concentration, 50％)
IARC (International Agency for Research on Cancer)
ACGIH (American Conference of Governmental Industrial Hygienists)
EPA (US Environmental Protection Agency)
NTP (US National Toxicology Program)
JSOH (Japan Society for Occupational Health)EU (European Union)
EC50 (Effective Concentration, 50％)
NOEC (No Observed Effect Concentration)
BOD (Biochemical Oxygen Demand)
COD (Chemical Oxygen Demand)
BCF (Bioconcentration Factor)anh (anhydride)
General Disclaimer
This data sheet was created based on the information we currently have and may be revised
according to new information. In addition, the precautions apply only to normal handling,
and in the case of special handling, please make adequate countermeasure to maintain yoursafety.
The data given here is based on current knowledge and experience. The purpose of this
Safety Data Sheet is to describe the products in terms of their safety requirements. The
data does not signify any warranty with regard to the products' properties.
The GHS classification data given here is based on current Japan official data (NITE
published in 2022).