🛡️ Hazard Overview
- GHS Class: GHS07; GHS08; GHS09
- Signal Word: Danger
- Hazard Statements: H302; H315; H317; H319; H320; H334; H360; H361; H362; H370; H372; H373; H411
🧤 PPE Guidelines
- Gloves: Chemical‑resistant gloves suggested
- Eye Protection: Safety goggles suggested
- Respirator: Dust respirator if dust occurs
❄️ Storage
- Storage Temp: -20°C (-4°F) Keep dry
🚑 Emergency First Aid
- For inhalation, skin, eye or ingestion exposure, please refer to full SDS Section 4.
Product identifier
- Product Name: Potassium Iodide
- Catalog Number: S1897
- CAS Number: 7681-11-0
- IUPAC Name: 1H-Indole-3-carboxylic acid-(3-endo)-8-methyl-8-azabicyclo[3.2.1]oct-3-yl ester, hydrochloride (1:1)
Relevant identified uses and uses advised against
- Identified uses: For research and development use only; laboratory chemicals; manufacture of substances.
- Uses advised against: Not for pharmaceutical, household, or other unapproved uses.
Details of the supplier
- Company: Selleck Chemicals
- TollFree: +1 877 796-6397
- Tel: +1 832 582-8158
- Fax: +1 832 582-8590
Emergency telephone number
- Emergency phone #: +1 832 582-8158
2.1 GHS classification in accordance with 29 CFR 1910 (OSHA HCS):
Acute toxicity (oral): Category 4. H302
Skin irritation: Category 2. H315
Skin sensitization: Category 1. H317
Serious eye irritation: Category 2. H319
Eye irritation: Category 2. H320
Respiratory sensitization: Category 1. H334
Reproductive toxicity: Category 1. H360
Reproductive toxicity: Category 2. H361
Reproductive toxicity: Category 1B. H362
Specific target organ toxicity (single exposure): Category 1. H370
Specific target organ toxicity (repeated exposure): Category 1. H372
Specific target organ toxicity (repeated exposure): Category 2. H373
Chronic aquatic toxicity: Category 2. H411
2.2 GHS Label elements, including precautionary statements
Hazard Pictogram(s):
Signal Word:
Danger
Hazard statement(s):
H302: Harmful if swallowed
H315: Causes skin irritation
H317: May cause an allergic skin reaction
H319: Causes serious eye irritation
H320: Causes eye irritation
H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled
H360: May damage fertility or the unborn child
H361: Suspected of damaging fertility or the unborn child
H362: May cause harm to breast-fed children
H370: Causes damage to organs
H372: Causes damage to organs through prolonged or repeated exposure
H373: May causes damage to organs through prolonged or repeated exposure
H411: Toxic to aquatic life with long lasting effects
Precautionary statement(s):
Prevention:
P203: Obtain, read and follow all safety instructions before use.
P233: Keep container tightly closed.
P260: Do not breathe dust/fume/gas/mist/vapors/spray.
P261: Avoid breathing dust/fume/gas/mist/vapors/spray.
P263: Avoid contact during pregnancy/while nursing.
P264: Wash hands thoroughly after handling.
P264+P265: Wash hands thoroughly after handling. Do not touch eyes.
P270: Do not eat, drink or smoke when using this product.
P271: Use only outdoors or in a well-ventilated area.
P272: Contaminated work clothing should not be allowed out of the workplace.
P273: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection/hearing protection.
P284: [In case of inadequate ventilation] Wear respiratory protection.
Response:
P301+P317: IF SWALLOWED: Get medical help.
P302+P352: IF ON SKIN: wash with plenty of water.
P304+P340: IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P305+P351: IF IN EYES: Rinse cautiously with water for several minutes.
P308+P316: IF exposed or concerned: Get emergency medical help immediately.
P318: if exposed or concerned, get medical advice.
P319: Get medical help if you feel unwell.
P321: Specific treatment (see information on this label and safety datasheet)).
P330: Rinse mouth.
P332+P317: If skin irritation occurs: Get medical help.
P333+P317: If skin irritation or rash occurs: Get medical help.
P337+P317: If eye irritation persists: Get medical help.
P338: Remove contact lenses, if present and easy to do. Continue rinsing.
P342+P316: If experiencing respiratory symptoms: Get emergence medical help immediately.
P362+P364: Take off contaminated clothing and wash it before reuse.
P391: Collect spillage.
Storage:
P403: Store in a well-ventilated place.
P405: Store locked up.
Disposal:
P501: P501 Dispose of contents/ container to an approved waste disposal plant.
2.3 Other hazards
None.
3.1 Substances
Product name: Potassium Iodide
CAS Number: 7681-11-0
PubChem CID: 4875
Molecular formula: IK
Molecular weight: 166.0028 g/mol
IUPAC name: potassium iodide
3.2 Mixtures
Not applicable (pure substance).
4.1 Description of first aid measures
Inhalation: Move to fresh air. Keep at rest in a position comfortable for breathing. Seek medical attention if symptoms persist.
Skin contact: Wash with plenty of soap and water. Remove contaminated clothing. Seek medical attention if irritation develops.
Eye contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek medical attention.
Ingestion: Rinse mouth. Do NOT induce vomiting unless directed by medical personnel. Seek medical attention.
4.2 Most important symptoms and effects, both acute and delayed
See Section 11 (Toxicological Information).
4.3 Indication of any immediate medical attention and special treatment needed
Treat symptomatically. Contact a poison control center or physician for severe exposure.
5.1 Extinguishing media
Suitable: Water spray, dry chemical, carbon dioxide (CO2), alcohol-resistant foam.
Unsuitable: None known.
5.2 Specific hazards arising from the substance or mixture
Combustible. Heating may produce toxic fumes.
5.3 Advice for firefighters
Wear self-contained breathing apparatus (SCBA) and full protective clothing.
Fight fire from upwind. Cool containers with water spray until fire is extinguished.
6.1 Personal precautions, protective equipment and emergency procedures
Wear appropriate personal protective equipment (see Section 8).
Avoid breathing dust/vapor. Ensure adequate ventilation.
Evacuate personnel to safe areas. Keep people away from and upwind of spill.
6.2 Environmental precautions
Prevent product from entering drains, waterways, or soil.
Contain spill with inert absorbent material.
6.3 Methods and materials for containment and cleaning up
SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.
7.1 Precautions for safe handling
Store below 40 °C (104 °F), preferably between 15 and 30 °C (59 and 86 °F), unless otherwise specified by manufacturer. Store in a tight container.
7.2 Conditions for safe storage, including any incompatibilities
Store below 40 °C (104 °F), preferably between 15 and 30 °C (59 and 86 °F), unless otherwise specified by manufacturer. Store in a tight container.
Store away from incompatible materials (see Section 10).
[Note: Specific storage temperature not available in public databases. Refer to supplier Certificate of Analysis (COA) for exact storage conditions.]
8.1 Exposure controls
8.1.1 Occupational exposure limits (OEL)
OSHA PEL: Not established.
ACGIH TLV: Not established.
NIOSH REL: Not established.
No occupational exposure limit values are established for this substance.
Use the lowest feasible exposure level (ALARA principle).
8.1.2 Appropriate engineering controls
Use only in a chemical fume hood or with local exhaust ventilation.
Ensure adequate ventilation to keep airborne concentrations below exposure limits.
8.2 Individual protection measures
8.2.1 Eye/face protection
Wear chemical safety goggles.
8.2.2 Skin protection
Wear protective gloves. Recommended material: Nitrile rubber.
Wear suitable protective clothing (lab coat).
8.2.3 Respiratory protection
Use NIOSH-approved dust/mist respirator (N95 or higher) if ventilation is inadequate.
8.2.4 Thermal hazards
Not applicable.
9.1 Information on basic physical and chemical properties
a) Appearance: Potassium iodide is an odorless white solid. Sinks and mixes with water. (USCG, 1999)
b) Odor: No data available
c) Odor threshold: No data available
d) pH: Aqueous solution in neutral or usually alkaline, pH 7-9
e) Melting point/freezing point: 1258 °F (USCG, 1999)
f) Initial boiling point and boiling range: Very high (USCG, 1999)
g) Flash point: No data available
h) Evaporation rate: No data available
i) Flammability (solid, gas): No data available
j) Upper/lower flammability or explosive limits: No data available
k) Vapor pressure: 1 [mm Hg] @745 °C
l) Vapor density: No data available
m) Relative density: 3.13 at 59 °F (USCG, 1999) - Denser than water; will sink
n) Water solubility: Slightly soluble in ethanol
o) Partition coefficient: n-octanol/water: Log P: No data available
p) Auto-ignition temperature: Not flammable (USCG, 1999)
q) Decomposition temperature: No data available
r) Viscosity: No data available
s) Explosive properties: No data available
t) Oxidizing properties: No data available
9.2 Other information
Complexity: 2
10.1 Reactivity
No specific reactivity hazards identified under normal handling conditions.
10.2 Chemical stability
Stable under recommended storage conditions.
10.3 Possibility of hazardous reactions
No hazardous reactions under normal conditions.
10.4 Conditions to avoid
Avoid heat, sparks, open flames, direct sunlight, and moisture.
10.5 Incompatible materials
A sample of fluorine perchlorate exploded on contact with a potassium iodide solution.
Incompatibilities: mercurous chloride in presence of an excess of potassium iodide produces metallic mercury & mercuric iodide, the latter forming the soluble double salt, potassium mercuric iodide.
10.6 Hazardous decomposition products
No data available.
See also Section 5 (Fire-fighting measures) for combustion products.
11.1 Information on toxicological effects
Acute toxicity:
No acute toxicity data available.
Skin corrosion/irritation:
Causes skin irritation (H315).
Serious eye damage/eye irritation:
Causes serious eye irritation (H319).
Respiratory or skin sensitization:
May cause allergy or asthma symptoms or breathing difficulties if inhaled (H334).
Germ cell mutagenicity:
No data available.
Carcinogenicity:
No data available.
Reproductive toxicity:
May damage fertility or the unborn child (H360).
Specific target organ toxicity (single exposure):
H370, H372, H373
Specific target organ toxicity (repeated exposure):
No data available.
Aspiration hazard:
No data available.
11.2 Additional information
No additional toxicological information available.
12.1 Toxicity
While data specific to potassium iodide were not located(SRC, 2006), the literature suggests that some pharmaceutically active compounds originating from human and veterinary therapy are not eliminated completely in municipal sewage treatment plants and are therefore discharged into receiving waters(1). Wastewater treatment processes often were not designed to remove them from the effluent(2). Selected organic waste compounds may be degrading to new and more persistent compounds that may be released instead of or in addition to the parent compound(2). Studies have indicated that several polar pharmaceutically active compounds can leach through subsoils into aquifers(1).
Potassium iodide is distributed into /human/ breast milk ...
12.2 Persistence and degradability
No data available.
12.3 Bioaccumulative potential
No data available.
12.4 Mobility in soil
No data available.
12.5 Results of PBT and vPvB assessment
PBT/vPvB assessment not available.
12.6 Other adverse effects
This substance is classified as hazardous to the aquatic environment.
13.1 Waste treatment methods
Waste Treatment Methods: Waste material must be disposed of in accordance with national and local regulations. Leave chemicals in original containers and do not mix with other waste. Handle uncleaned containers in the same manner as the product itself.
14.1 UN number
Not regulated as dangerous goods (research quantities typically exempt).
14.2 UN proper shipping name
Not subject to transport regulations (small quantities for research use).
14.3 Transport hazard class(es)
Not classified as dangerous goods for transport (research quantities).
14.4 Packing group
Not applicable (not regulated as dangerous goods in typical research quantities).
14.5 Environmental hazards
Marine pollutant: Yes (classified as environmentally hazardous per GHS).
14.6 Special precautions for user
Transport in original packaging. Ensure containers are tightly sealed.
For bulk or commercial quantities, consult applicable transport regulations (DOT, IATA, IMDG).
14.7 Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code
Not applicable.
15.1 Safety, health and environmental regulations/legislation specific for the substance or mixture
US EPA / TSCA: Subject to EPA TSCA regulations
EU ECHA / REACH: Registered (REACH Active)
SARA 302 Components:
No chemicals in this material are subject to the reporting requirements of SARA Title III, Section 302.
SARA 313 Components:
This material does not contain any chemical components with known CAS numbers that exceed the threshold (De Minimis) reporting levels established by SARA Title III, Section 313.
SARA 311/312 Hazards:
Acute (short-term) health hazard
Chronic (long-term) health hazard
Environmental hazard
Massachusetts Right To Know Components:
This material contains components subject to the Massachusetts Right to Know Act. See Section 2 for hazard classification.
Pennsylvania Right To Know Components:
This material contains components subject to the Pennsylvania Right to Know Act. See Section 2 for hazard classification.
New Jersey Right To Know Components:
This material contains components subject to the New Jersey Right to Know Act. See Section 2 for hazard classification.
California Prop. 65 Components:
This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm.
Other regulatory listings:
- The Australian Inventory of Industrial Chemicals: Chemical: Potassium iodide (KI)
- EFSA Legal Basis: Commission Regulation (EU) No 188/2011
- Status Regulation (EC): 05/751/EC, Reg. (EU) No 116/2014
- State Drinking Water Guidelines: (ME) MAINE 340 ug/L /Iodide ion/
- FIFRA Requirements: Residues of the following chemical substances are exempted from the requirement of a tolerance when used in accordance with good manufacturing practice as ingredients in an antimicrobial pesticide formulation, provided that the substance is applied on a semi-permanent or permanent food-contact surfa
15.2 Chemical safety assessment
A chemical safety assessment has not been carried out for this substance.
For research-use-only compounds, no CSA is required under REACH Annex I.
Revision Date: 2026/09/08
Further Information: The information provided is believed to be correct but is not exhaustive and should be used only as a guideline based on current knowledge. It does not represent a guarantee of the properties of the product. Selleck Chemicals Corporation and its Affiliates shall not be held liable for any damage resulting from handling or contact with the product.