{"id":94647,"date":"2026-04-06T19:54:57","date_gmt":"2026-04-06T17:54:57","guid":{"rendered":"https:\/\/medqmedicalsuppliers.co.za\/?post_type=product&p=94647"},"modified":"2026-04-06T19:55:15","modified_gmt":"2026-04-06T17:55:15","slug":"methyl-orange-25g-2","status":"publish","type":"product","link":"https:\/\/medqmedicalsuppliers.co.za\/?product=methyl-orange-25g-2","title":{"rendered":"Methyl Orange 25g"},"content":{"rendered":"

Methyl Orange<\/strong>
Section 1 \u2013 Chemical Product MSDS Name: Methyl Orange<\/strong>
Synonyms: C.I. 13025; C.I. Acid Orange 52; Dexon; Diazoben; Eniamethyl Orange; Helianthine; Gold
Orange; Methyl Orange B; Orange 3; Tropaeol<\/p>\n

Section 2 \u2013 Composition, Information on Ingredients<\/strong>
CAS# Chemical Name Percent EINECS\/ELINCS
547-58-0 C.I. acid orange 52 ca. 100 208-925-3<\/p>\n

Section 3 \u2013 Hazards Identification<\/strong>
EMERGENCY OVERVIEW
Appearance: orange solid.
Warning! Harmful if swallowed. May cause eye, skin, and respiratory tract irritation.
Target Organs: None.
Potential Health Effects
Eye: May cause eye irritation. This product contains an anionic dye. Similar dyes have not caused
injury to the cornea or conjunctiva in documented exposure cases with human or rabbit eyes.
Skin: May cause skin irritation.
Ingestion: Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and
diarrhea.
Inhalation: May cause respiratory tract irritation. The toxicological properties of this substance have
not been fully investigated.
Chronic: No information found.<\/p>\n

Section 4 \u2013 First Aid Measures<\/strong>
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower
eyelids. Get medical aid.
Skin: Get medical aid if irritation develops or persists. Wash clothing before reuse. Flush skin with
plenty of soap and water.
Ingestion: If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by
mouth to an unconscious person. Get medical aid immediately.
Inhalation: Remove from exposure and move to fresh air immediately. If not breathing, give artificial
respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician: Treat symptomatically and supportively.<\/p>\n

Section 5 \u2013 Fire Fighting Measures<\/strong>
General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand,
MSHA\/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly
toxic gases may be generated by thermal decomposition or combustion. Vapors may be heavier than
air. They can spread along the ground and collect in low or confined areas.
Extinguishing Media: Use extinguishing media most appropriate for the surrounding fire. Use water
spray, dry chemical, carbon dioxide, or appropriate foam.
Flash Point: Not applicable.
Autoignition Temperature: Not applicable.
Explosion Limits, Lower:Not available.
Upper: Not available.
NFPA Rating: (estimated) Health: 2; Flammability: 0; Instability: 0
Section 6 \u2013 Accidental Release Measures
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills\/Leaks: Clean up spills immediately, observing precautions in the Protective Equipment section.
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal.
Avoid generating dusty conditions. Provide ventilation.<\/p>\n

Section 7 \u2013 Handling and Storage<\/strong>
Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse.
Use with adequate ventilation. Avoid contact with skin and eyes. Keep container tightly closed. Do
not ingest or inhale.
Storage: Store in a cool, dry, well-ventilated area away from incompatible substances. Keep
containers tightly closed.<\/p>\n

Section 8 \u2013 Exposure Controls, Personal Protection<\/strong>
Engineering Controls: Use adequate ventilation to keep airborne concentrations low.
Exposure Limits
Chemical Name ACGIH NIOSH OSHA \u2013 Final PELs
C.I. acid orange 52 none listed none listed none listed
OSHA Vacated PELs: C.I. acid orange 52: No OSHA Vacated PELs are listed for this chemical.
Personal Protective Equipment
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA\u2019s eye
and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin: Wear appropriate protective gloves to prevent skin exposure.
Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators: A respiratory protection program that meets OSHA\u2019s 29 CFR 1910.134 and ANSI Z88.2
requirements or European Standard EN 149 must be followed whenever workplace conditions
warrant respirator use.<\/p>\n

Section 9 \u2013 Physical and Chemical Properties<\/strong>
Physical State: Solid
Appearance: orange
Odor: odorless
pH: Not available.
Vapor Pressure: Negligible.
Vapor Density: 11.3
Evaporation Rate:Neglilible.
Viscosity: Not available.
Boiling Point: Not available.
Freezing\/Melting Point:> 300 deg C
Decomposition Temperature:Not available.
Solubility: Soluble in hot water.
Specific Gravity\/Density:1.00
Molecular Formula:C14H14N3O3SNa
Molecular Weight:327.1661<\/p>\n

Section 10 \u2013 Stability and Reactivity<\/strong>
Chemical Stability: Stable under normal temperatures and pressures.
Conditions to Avoid: Incompatible materials, excess heat.
Incompatibilities with Other Materials: Strong oxidizing agents.
Hazardous Decomposition Products: Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen
gas, sulfur oxides (SOx), including sulfur oxide and sulfur dioxide.
Hazardous Polymerization: Will not occur.<\/p>\n

Section 11 \u2013 Toxicological Information<\/strong>
RTECS#:
CAS# 547-58-0: DB6327000
LD50\/LC50:
CAS# 547-58-0:
Oral, rat: LD50 = 60 mg\/kg;
.
Carcinogenicity:
CAS# 547-58-0: Not listed by ACGIH, IARC, NTP, or CA Prop 65.
Epidemiology: No information available.
Teratogenicity: No information available.
Reproductive Effects: No information available.
Mutagenicity: Human mutation data is available. However, methyl orange produced negative and
inconclusive results in tests by the EPA Gentox Program.
Neurotoxicity: No information available.
Other Studies:<\/p>\n

Section 12 \u2013 Ecological Information<\/strong>
Ecotoxicity: No data available. No information available.
Environmental: Terrestrial: Moderately mobile in soil. Aquatic: Will not adsorb into sediment,
eventually settles out. Atmospheric: Exists in particulate phase. Does not biodegrade, low
bioconcentration potential.
Physical: No information available.
Other: No information available.<\/p>\n

Section 13 \u2013 Disposal Considerations<\/strong>
Chemical waste generators must determine whether a discarded chemical is classified as a
hazardous waste. US EPA guidelines for the classification determination are listed in 40 CFR Parts
261.3. Additionally, waste generators must consult state and local hazardous waste regulations to
ensure complete and accurate classification.
RCRA P-Series: None listed.
RCRA U-Series: None listed.<\/p>\n

Section 14 \u2013 Transport Information<\/strong>
US DOT Canada TDG
Shipping Name: TOXIC SOLIDS, ORGANIC, N.O.S. TOXIC SOLID ORGANIC NOS (METHYL ORANGE)
Hazard Class: 6.1 6.1
UN Number: UN2811 UN2811
Packing Group: III III<\/p>\n

Section 15 \u2013 Regulatory Information<\/strong>
US FEDERAL
TSCA
CAS# 547-58-0 is listed on the TSCA inventory.
Health & Safety Reporting List
None of the chemicals are on the Health & Safety Reporting List.
Chemical Test Rules
None of the chemicals in this product are under a Chemical Test Rule.
Section 12b
None of the chemicals are listed under TSCA Section 12b.
TSCA Significant New Use Rule
None of the chemicals in this material have a SNUR under TSCA.
CERCLA Hazardous Substances and corresponding RQs
None of the chemicals in this material have an RQ.
SARA Section 302 Extremely Hazardous Substances
None of the chemicals in this product have a TPQ.
Section 313 No chemicals are reportable under Section 313.
Clean Air Act:
This material does not contain any hazardous air pollutants.
This material does not contain any Class 1 Ozone depletors.
This material does not contain any Class 2 Ozone depletors.
Clean Water Act:
None of the chemicals in this product are listed as Hazardous Substances under the CWA.
None of the chemicals in this product are listed as Priority Pollutants under the CWA.
None of the chemicals in this product are listed as Toxic Pollutants under the CWA.
OSHA:
None of the chemicals in this product are considered highly hazardous by OSHA.
STATE
CAS# 547-58-0 is not present on state lists from CA, PA, MN, MA, FL, or NJ.
California Prop 65
California No Significant Risk Level: None of the chemicals in this product are listed.
European\/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols:
T
Risk Phrases:
R 25 Toxic if swallowed.
Safety Phrases:
S 28 After contact with skin, wash immediately with\u2026
S 45 In case of accident or if you feel unwell, seek medical advice
immediately (show the label where possible).
WGK (Water Danger\/Protection)
CAS# 547-58-0: 2
Canada \u2013 DSL\/NDSL
CAS# 547-58-0 is listed on Canada\u2019s DSL List.
Canada \u2013 WHMIS
This product has a WHMIS classification of D1B.
This product has been classified in accordance with the hazard criteria of the Controlled Products
Regulations and the MSDS contains all of the information required by those regulations.
Canadian Ingredient Disclosure List
CAS# 547-58-0 is listed on the Canadian Ingredient Disclosure List.<\/p>\n

Section 16 \u2013 Additional Information<\/strong>
The information above is believed to be accurate and represents the best information currently
available to us. However, we make no warranty of merchantability or any other warranty, express or
implied, with respect to such information, and we assume no liability resulting from its use. Users
should make their own investigations to determine the suitability of the information for their
particular purposes.<\/p>\n

Add to Wishlist<\/p>\n

Add to Wishlist<\/p>\n","protected":false},"excerpt":{"rendered":"

Chemical Product MSDS Name: Methyl Orange<\/strong>
Synonyms: C.I. 13025; C.I. Acid Orange 52; Dexon; Diazoben; Eniamethyl Orange; Helianthine; Gold
Orange; Methyl Orange B; Orange 3; Tropaeol<\/p>\n

Composition, Information on Ingredients<\/strong>
CAS# Chemical Name Percent EINECS\/ELINCS
547-58-0 C.I. acid orange 52 ca. 100 208-925-3<\/p>\n","protected":false},"featured_media":94683,"template":"","meta":{"content-type":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[8074],"product_tag":[11311],"class_list":{"0":"post-94647","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-lab-chemicals","7":"product_tag-methyl-orange-25g","8":"desktop-align-center","9":"tablet-align-center","10":"mobile-align-center","12":"first","13":"instock","14":"shipping-taxable","15":"purchasable","16":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/medqmedicalsuppliers.co.za\/index.php?rest_route=\/wp\/v2\/product\/94647","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/medqmedicalsuppliers.co.za\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/medqmedicalsuppliers.co.za\/index.php?rest_route=\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/medqmedicalsuppliers.co.za\/index.php?rest_route=\/wp\/v2\/media\/94683"}],"wp:attachment":[{"href":"https:\/\/medqmedicalsuppliers.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=94647"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/medqmedicalsuppliers.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_brand&post=94647"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/medqmedicalsuppliers.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=94647"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/medqmedicalsuppliers.co.za\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=94647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}