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Product Name: Nitrosyl Chloride
Chemical Formula: NOCl
Synonyms: Chlorooxynitrosyl, Nitrosyl monochloride
CAS Number: 2696-92-6
Recommended Use: Laboratory reagent, intermediate in chemical synthesis
Restrictions: Use only as directed for research or industrial manufacturing；not for food, drug, or home use
Supplier: Refer to local supply chain or regulatory agency for distributor details
Emergency Contact: Check local regulations and facility procedures for emergency numbers
Classification: Compressed gas, Acute toxicity (inhalation and oral), Skin corrosion/irritation, Eye damage
GHS Label Elements: Danger, Severe corrosive, Toxic gas, Causes burns, May be fatal if inhaled
Hazard Statements: Causes severe respiratory, skin, and eye irritation or burns; Harmful or fatal if swallowed or inhaled; May cause delayed lung injury
Precautionary Statements: Avoid breathing mist, gas, vapors; Use in well-ventilated places; Avoid contact with skin, eyes, and clothing; Wear face protection, gloves, and chemical resistant clothing
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Symptoms: Cough, shortness of breath, chest pain, burning of mouth/throat, skin blistering, vision loss
Chemical Name: Nitrosyl Chloride
CAS Registry Number: 2696-92-6
Concentration: >99% (pure reagent)
Impurities: May contain trace gases or water if improperly stored, but should be checked upon receipt
Additives: None intentionally added; pure chemical form required for industrial and laboratory use
Inhalation: Get person into fresh air immediately; keep warm and at rest; provide oxygen if breathing is difficult; start CPR if not breathing; get medical attention fast
Skin Contact: Remove contaminated clothing and shoes; rinse skin under running water for at least 15 minutes; do not delay seeking medical help
Eye Contact: Rinse eyes carefully under running water for a minimum of 15 minutes; keep eyelids open; do not let victim rub eyes; seek urgent medical care
Ingestion: Rinse mouth with water if person is conscious; do not induce vomiting; call poison control and get immediate medical attention
General Guidance: Ensure responders use self-contained breathing equipment and personal protective equipment
Suitable Extinguishing Media: Use dry chemical, CO2, or water spray from safe distance; do not direct water stream into leaking containers
Hazards: Releases toxic gases in fire, including nitrogen oxides and hydrochloric acid vapor
Protection for Firefighters: Wear full protective gear and self-contained breathing apparatus; fight fire from upwind and maximum distance
Specific Methods: Avoid runoff into drains; use water spray to cool containers; evacuate area of non-essential personnel
Explosion Data: Not flammable itself, but supports combustion of combustible materials and may react with metals to release hydrogen gas
Personal Precautions: Evacuate the area; ventilate confined or low-lying spaces; wear appropriate respiratory protection, chemical splash goggles, and chemical resistant clothing
Environmental Precautions: Prevent release to water systems and soil; notify authorities in case of large spills
Containment Methods: Seal leaks if safe; use neutralizing agents (lime, soda ash); do not use combustible materials for absorption
Cleanup Procedures: Collect with non-combustible, inert absorbent; keep spill residues in closed, labeled containers for disposal; decontaminate area with water and soda ash afterwards
Handling: Work in efficient fume hoods; use only in well-ventilated, corrosion-resistant environments; avoid breathing vapors or mist; prevent contact with skin and eyes; never use with incompatible materials (e.g., ammonia, metals, water on large scale)
Storage: Store in tightly closed, corrosion-resistant containers in a cool, dry, well-ventilated area; protect from sunlight and moisture; secure cylinders upright to prevent falling; keep away from incompatible chemicals; label all containers with hazard warnings and handling instructions
Special Rules: Only trained staff should handle or transfer nitrosyl chloride; keep emergency equipment like eyewash stations and showers nearby; restrict access to authorized personnel only
Exposure Limits: NIOSH REL: 0.1 ppm (ceiling); ACGIH TLV: 0.1 ppm (ceiling); check local standards for national regulations
Engineering Controls: Use local exhaust ventilation or chemical fume hood; sealed process equipment recommended
Personal Protective Equipment: Respirator with acid gas cartridge or SCBA for emergencies; chemical splash goggles with face shield; gloves made of Viton, butyl rubber, or similar; chemical resistant suit and boots
Hygiene Measures: Wash hands and exposed skin before eating, drinking, or leaving work; do not eat or drink near material; strictly avoid contact lens use
Monitoring: Air monitoring for NOCl levels in workplaces; regular maintenance and inspection of containment systems
Appearance: Pungent yellow to reddish-brown gas; can condense to a liquid under high pressure or low temperature
Odor: Penetrating, suffocating, acrid chlorine-like odor
Melting Point: -54°C (-65°F)
Boiling Point: -5.5°C (22.1°F)
Vapor Pressure: About 924 mm Hg at 20°C
Solubility: Reacts with water, forming hydrochloric and nitrous acids
Density: 1.45 g/cm³ at 0°C (liquid)
Vapor Density: Heavier than air
pH: Not applicable (reacts in water)
Flammability: Non-flammable but supports combustion
Partition Coefficient: Not established due to reactivity
Evaporation Rate: Rapid under normal atmospheric conditions
Chemical Stability: Stable only under recommended storage conditions
Reactivity: Highly reactive with reducing agents, ammonia, hydrocarbons, and water; incompatible with bases and some metals
Hazardous Polymerization: Does not polymerize
Decomposition Products: Nitrogen oxides, hydrogen chloride under heat or reaction with water or organics
Special Conditions: Avoid high temperature, sources of ignition, humidity, and incompatible materials; keep away from light to reduce decomposition risk
Routes of Exposure: Inhalation, dermal, ocular, oral
Acute Toxicity: LC50 (rat): 13 ppm (1 hr); serious risk of fatality with short-term exposure
Chronic Effects: Breathing low concentrations can cause lung damage, asthma-like symptoms, and delayed pulmonary edema
Skin/Eye Effects: Severe burns and ulceration possible; permanent vision loss from eye contact
Sensitization: Not reported to induce allergic skin or respiratory responses
Carcinogenicity / Mutagenicity: Not classified by EPA, IARC, or NTP
Other Effects: Delayed onset of symptoms possible after short, high exposure; repeated exposure increases sensitivity and risk of lung scarring
Aquatic Toxicity: Very toxic to aquatic life due to hydrolysis products (acidification of water, formation of harmful oxides)
Persistence: Hydrolyzes rapidly to nitrous and hydrochloric acids in moist environments
Mobility: Vapors can travel and settle in low-lying areas; gases may react in atmosphere forming acid rain
Bioaccumulation: No significant risk, as decomposes quickly in environment
Other Effects: May harm plants, soil organisms, and water quality if released into natural systems
Waste Methods: Neutralize in controlled chemical process with base before sending to licensed hazardous waste facility
Container Disposal: Triple-rinse empty vessels with neutralizing agent, then puncture and dispose as hazardous metal scrap
Legal Compliance: Only employees trained in hazardous chemical disposal should handle material; keep waste documentation for regulatory review
Precautions: Do not dump down drains, regular waste systems, or open environment; always follow EPA, OSHA, and local rules
UN Number: 1660
UN Proper Shipping Name: Nitrosyl chloride
Transport Hazard Class: 2.3 (Toxic Gas), 8 (Corrosive)
Packing Group: I
Labeling: Toxic gas, corrosive, and environment; proper placarding required on vehicles
Special Precautions: Ship with tightly secured, corrosion-resistant cylinders; avoid shock, vibration, and temperature extremes; trained hazmat handlers only
Emergency Response Guide: Refer to ERG Guide 124 for leaks, fire, first aid, and evacuation procedures in transit emergencies
OSHA: Covered under Process Safety Management (PSM) for toxic and reactive chemicals
EPA: Listed as Extremely Hazardous Substance (EHS); subject to Emergency Planning and Community Right-to-Know Act (EPCRA) reporting
TSCA: Included in TSCA Inventory; production, import, and disposal regulated by federal law
EU GHS: Covered under CLP, REACH; restricted uses and reporting obligations
DOT: Regulated as Dangerous Goods; subject to 49 CFR hazardous materials rules
Other Regulations: Countries may have specific workplace exposure, transport, and use requirements; always check updated national and international chemical safety regulations
