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O-Methylisourea hemisulfate salt

Item number	686100
CAS	52328-05-9
Formula	C4H14N4O6S
Molecular weight	246,24 g/mol
Quantity	1x250mg
storage conditions	4 °C
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Safety Data Sheet	according to Regulation (EC) No 1907/2006 (REACH) Classifications according to Regulation (EC) No 1272/2008. Printdate May 30, 2026
IDENTIFICATION OF THE SUBSTANCE/MIXTURE AND OF THE COMPANY/UNDERTAKING
Product name:	O-Methylisourea hemisulfate salt
Catalog No.:	686100
Relevant identified uses of the substance or mixture	Identified: Laboratory chemical uses: R&D
Uses advised against:	HPC Standards Inc 271 17th Street, NW, Suite 1750 Atlanta, GA 30363 Tel. +1 (678) 244-1536 Fax. +1 (404) 586-6820 sales@hpc-standards.us
Emergency telephone number	HPC Standards Tel. +1 (678) 244-1536 This number is only available during office hours.
HAZARDS IDENTIFICATION	2.1 Classification of the substance or mixture
Label elements
Pictogram
	2.2 Label Elements 2.3 Other hazards - none
COMPOSITION/INFORMATION ON INGREDIENTS	3.1 Substances Synonyms : OMI Formula : C2H6N2O · 0.5 H2SO4 Molecular weight : 123,12 g/mol CAS-No. : 52328-05-9 EC-No. : 257-851-8 No components need to be disclosed according to the applicable regulations
Formula	C4H14N4O6S
Molecular Weight (g/mol)	246.24
CAS-No.	52328-05-9
FIRST AID MEASURES	4.1 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 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 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 4.3 Indication of any immediate medical attention and special treatment needed No data available
FIRE-FIGHTING MEASURES	5.1 Extinguishing media Suitable extinguishing media Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. 5.2 Special hazards arising from the substance or mixture Carbon oxides, Nitrogen oxides (NOx), Sulphur oxides 5.3 Advice for firefighters Wear self-contained breathing apparatus for firefighting if necessary. 5.4 Further information No data available
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. Avoid breathing dust. For personal protection see section 8. 6.2 Environmental precautions Do not let product enter drains. 6.3 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. 6.4 Reference to other sections For disposal see section 13.
HANDLING AND STORAGE	7.1 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. 7.2 Conditions for safe storage, including any incompatibilities Store in cool place. Keep container tightly closed in a dry and well-ventilated place. 7.3 Specific end use(s) Apart from the uses mentioned in section 1.2 no other specific uses are stipulated
EXPOSURE CONTROLS/PERSONAL PROTECTION
PHYSICAL AND CHEMICAL PROPERTIES	9.1 Information on basic physical and chemical properties a) Appearance Form: crystalline Colour: white b) Odour No data available c) Odour Threshold No data available d) pH No data available e) Melting point/freezing point Melting point/range: 163 - 167 °C f) Initial boiling point and boiling range No data available 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) Vapour pressure < 0,003 hPa at 25 °C l) Vapour density No data available m) Relative density No data available n) Water solubility No data available o) Partition coefficient: n-octanol/water log Pow: 0,67 p) Auto-ignition temperature No data available 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 safety information No data available
STABILITY AND REACTIVITY	10.1 Reactivity No data available 10.2 Chemical stability Stable under recommended storage conditions. 10.3 Possibility of hazardous reactions No data available 10.4 Conditions to avoid No data available 10.5 Incompatible materials Strong oxidizing agents 10.6 Hazardous decomposition products Hazardous decomposition products formed under fire conditions. - Carbon oxides, Nitrogen oxides (NOx), Sulphur oxides Other decomposition products - No data available In the event of fire: see section 5
TOXICOLOGICAL INFORMATION	11.1 Information on toxicological effects Acute toxicity LD50 Oral - Rat - 3.700 mg/kg LC50 Inhalation - Rat - 4 h - > 2.133 mg/m3 Skin corrosion/irritation Skin - Rabbit Result: No skin irritation - 4 h Serious eye damage/eye irritation Eyes - Rabbit Result: Mild eye irritation - 24 h Respiratory or skin sensitisation No data available Germ cell mutagenicity Result: Not mutagenic in Ames Test Histidine reversion (Ames) 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 Specific target organ toxicity - single exposure Specific target organ toxicity - repeated exposure Aspiration hazard Additional Information RTECS: Not available
ECOLOGICAL INFORMATION	12.1 Toxicity Toxicity to fish LC50 - Leuciscus idus (Golden orfe) - 2,425 mg/l - 48 h 12.2 Persistence and degradability No data available 12.3 Bioaccumulative potential 12.4 Mobility in soil 12.5 Results of PBT and vPvB assessment PBT/vPvB assessment not available as chemical safety assessment not required/not conducted 12.6 Other adverse effects No data available
DISPOSAL CONSIDERATIONS	13.1 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.
TRANSPORT INFORMATION	14.1 UN number ADR/RID: - IMDG: - IATA: - 14.2 UN proper shipping name ADR/RID: Not dangerous goods IMDG: Not dangerous goods IATA: Not dangerous goods 14.3 Transport hazard class(es) ADR/RID: - IMDG: - IATA: - 14.4 Packaging group ADR/RID: - IMDG: - IATA: - 14.5 Environmental hazards ADR/RID: no IMDG Marine pollutant: no IATA: no 14.6 Special precautions for user No data available
REGULATORY INFORMATION	15.1 Safety, health and environmental regulations/legislation specific for the substance or mixture This safety datasheet complies with the requirements of Regulation (EC) No. 1907/2006. International Chemical Weapons Convention (CWC) Schedules of Toxic Chemicals and Precursors : Neither banned nor restricted REACH - Restrictions on the manufacture, placing on the market and use of certain dangerous substances, preparations and articles (Annex XVII) : Neither banned nor restricted Regulation (EC) No 649/2012 of the European Parliament and the Council concerning the export and import of dangerous chemicals : Neither banned nor restricted REACH - Candidate List of Substances of Very High Concern for Authorisation (Article 59). : This product does not contain substances of very high concern (Regulation (EC) No 1907/2006 (REACH), Article 57). This product contains a substance listed on Annex XIV of the REACH Regulation (EC) Nr. 1907/2006. Listed substance / Sunset Date: After the sunset date the use of this substance requires either an authorization or can only be used for exempted uses, e.g. use in scientific research and development which includes routine analytics or use as intermediate. Regulation (EC) No 1005/2009 on substances that deplete the ozone layer : Neither banned nor restricted 15.2 Chemical safety assessment For this product a chemical safety assessment was not carried out
OTHER INFORMATION	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. For lab use only!