🛡️ Hazard Overview
- GHS Class: GHS07; GHS08
- Signal Word: Warning
- Hazard Statements: H317; H341; H351; H373; H413
🧤 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: Sudan I
- Catalog Number: S6191
- CAS Number: 842-07-9
- IUPAC Name: 2-Naphthalenol, 1-(2-phenyldiazenyl)-
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):
Skin sensitization: Category 1. H317
Germ cell mutagenicity: Category 2. H341
Carcinogenicity: Category 2. H351
Specific target organ toxicity (repeated exposure): Category 2. H373
Chronic aquatic toxicity: Category 4. H413
2.2 GHS Label elements, including precautionary statements
Hazard Pictogram(s):
Signal Word:
Warning
Hazard statement(s):
H317: May cause an allergic skin reaction
H341: Suspected of causing genetic defects
H351: Suspected of causing cancer
H373: May causes damage to organs through prolonged or repeated exposure
H413: May cause long lasting harmful effects to aquatic life
Precautionary statement(s):
Prevention:
P203: Obtain, read and follow all safety instructions before use.
P260: Do not breathe dust/fume/gas/mist/vapors/spray.
P261: Avoid breathing dust/fume/gas/mist/vapors/spray.
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.
Response:
P302+P352: IF ON SKIN: wash with plenty of water.
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)).
P333+P317: If skin irritation or rash occurs: Get medical help.
P362+P364: Take off contaminated clothing and wash it before reuse.
Storage:
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: Sudan I
CAS Number: 842-07-9
PubChem CID: 13297
Molecular formula: C16H12N2O
Molecular weight: 248.28 g/mol
IUPAC name: 1-phenyldiazenylnaphthalen-2-ol
3.2 Mixtures
Not applicable (pure substance).
4.1 Description of first aid measures
Inhalation: INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater
Skin contact: SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
Eye contact: EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.
Ingestion: INGESTION: DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport
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
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. A water spray may also be used. (NTP, 1992)
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
Sweep up or absorb with inert material (e.g., sand, vermiculite).
Place in sealed, labeled container for disposal.
Wash spill area with water.
7.1 Precautions for safe handling
SMALL SPILLS AND LEAKAGE: If a spill of this chemical occurs, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with acetone and transfer the dampened material to a suitable container. Use absorbent paper dampened with acetone to pick up any remaining material. Seal your contaminated clothing and the adsorbent paper in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with acetone followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
STORAGE PRECAUTIONS: You should protect this material from exposure to light. Keep it away from oxidizing materials and store it at ambient temperatures. (NTP, 1992)
7.2 Conditions for safe storage, including any incompatibilities
Store in a cool, dry, well-ventilated area. Keep container tightly closed.
Store away from incompatible materials (see Section 10).
Protect from light and moisture.
Recommended storage (industry convention for research compounds): -20°C for long-term storage; 2-8°C for short-term use and transport.
[Note: This is a general industry recommendation. Always verify exact storage conditions with the supplier Certificate of Analysis (COA).]
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 in a well-ventilated area. Chemical fume hood recommended for powder handling.
8.2 Individual protection measures
8.2.1 Eye/face protection
Wear safety glasses with side shields.
8.2.2 Skin protection
Wear protective gloves. Recommended material: Nitrile rubber.
Wear suitable protective clothing (lab coat).
8.2.3 Respiratory protection
Respiratory protection usually not required under normal use with adequate ventilation.
Use N95 respirator for large-scale powder handling.
8.2.4 Thermal hazards
Not applicable.
9.1 Information on basic physical and chemical properties
a) Appearance: C.i. solvent yellow 14 appears as dark reddish-yellow leaflets or orange powder. Slight odor. (NTP, 1992)
b) Odor: No data available
c) Odor threshold: No data available
d) pH: No data available
e) Melting point/freezing point: 268 to 271 °F (NTP, 1992)
f) Initial boiling point and boiling range: greater than 212 °F at 760 mmHg (sublimes) (NTP, 1992)
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: 0.00000007 [mmHg]
l) Vapor density: No data available
m) Relative density: 0.18 (NTP, 1992) - Less dense than water; will float
n) Water solubility: less than 0.1 mg/mL at 64 °F (NTP, 1992)
o) Partition coefficient: n-octanol/water: Log P (n-octanol/water): 4.1
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 information
Topological Polar Surface Area (TPSA): 45 Ų
Complexity: 312
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.
Avoid strong oxidizing agents, strong acids, and strong bases.
10.5 Incompatible materials
Strong oxidizing agents, strong acids, strong bases.
10.6 Hazardous decomposition products
Thermal decomposition may produce: Carbon monoxide (CO), Carbon dioxide (CO₂), Nitrogen oxides (NOx).
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:
No data available.
Serious eye damage/eye irritation:
No data available.
Respiratory or skin sensitization:
May cause an allergic skin reaction (H317).
Germ cell mutagenicity:
Suspected of causing genetic defects (H341).
Carcinogenicity:
Suspected of causing cancer (H351).
Reproductive toxicity:
No data available.
Specific target organ toxicity (single exposure):
H373
Specific target organ toxicity (repeated exposure):
No data available.
Aspiration hazard:
No data available.
11.2 Additional information
Carcinogen classification:
Sudan I
Group 3: Not classifiable as to its carcinogenicity to humans
Volume 8: (1975) Some Aromatic Azo Compounds
Volume Sup 7: Overall Evaluations of Carcinogenicity: An Updating of IARC Monographs Volumes 1 to 42, 1987; 440 pages; ISBN 92-832-1411-0 (out of print)
1987
1987
C.I. Solvent Yellow 14
TR-226: Carcinogenesis Bioassay of C.I. Solvent Yellow 14 (CASRN 842-07-9) in F344/N Rats and B6C3F1 Mice (Feed Study) (1982 )
02/18/81
Clear Evidence
Clear Evidence
No Evidence
No Evidence
Under th
Data source: Hazardous Substances Data Bank (HSDB) via PubChem.
12.1 Toxicity
Beauticians exposed to paraphenylenediamine derivatives in hair dyes, workers dyeing textile resins, and photographic film developers exposed to color developing solutions not infrequently become sensitized to azo dyes. /Organic dyes/
12.2 Persistence and degradability
No data available.
12.3 Bioaccumulative potential
Log P (n-octanol/water): 4.1
Potential for bioaccumulation exists (Log P > 3).
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: No (not 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 does not contain any chemicals known to the State of California to cause cancer, birth defects, or any other reproductive harm.
Other regulatory listings:
- The Australian Inventory of Industrial Chemicals: Chemical: 2-Naphthalenol, 1-(phenylazo)-
- California Safe Cosmetics Program (CSCP) Reportable Ingredient: Hazard Traits - Carcinogenicity Authoritative List - Prop 65 Report - regardless of intended function of ingredient in the product
- EFSA Legal Basis: Regulation (EC) No 178/2002 (amended)
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: 2026/09/09
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.