HazMat Tool — substance information
Isosorbide-5-mononitrate
HMT 15 June 2026- UN / ID
- UN 3251
- Hazard class
- 4.1
- Packing group
- III
- ERG guide
- ERG 133
- Special provisions
- SP 66, SP 159, SP IB8
- Source
- 49 CFR §172 (15 June 2026)
Isosorbide-5-mononitrate
Isosorbide mononitrate, sold under many brand names, is a medication used for heart-related chest pain (angina), heart failure and esophageal spasms. It can be used both to treat and to prevent heart-related chest pain; however, it is generally less preferred than beta blockers or calcium channel blockers. It is taken by mouth. Common side effects include headache, low blood pressure with standing, blurry vision, and skin flushing Wikipedia
| Emergency Response Guide No. 133 |
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(3) Hazard Class4.1Flammable solids |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(7) Special Provisions (§172.102)
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| 66 | |
|---|---|
| 159 | |
| IB8 |
(8) Packing Authorizations (§173.***) 
| (8A) Exceptions | 151 | see 49 CFR §173.151 |
|---|---|---|
| (8B) Non-bulk | 223 | see 49 CFR §173.223 |
| (8C) Bulk | 240 | see 49 CFR §173.240 |
(9) Quantity Limits 
| (9A) Passenger aircraft/rail | Forbidden |
|---|---|
| (9B) Cargo aircraft only | Forbidden |
(10) Vessel stowage 
| (10A) Location | |
|---|---|
| (10B) Other |
Segregation chart for load, transport, and storage
This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.
| Hazard class | 8![]() | 7![]() | 6.1![]() | 5.2![]() | 5.1![]() | 4.3![]() | 4.2![]() | 4.1![]() | 3![]() | 2.3B![]() | 2.3A![]() | 2.2![]() | 2.1![]() | 1.6![]() | 1.5![]() | 1.4![]() | 1.3![]() | 1.1/1.2![]() |
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3 ![]() | ||||||||||||||||||
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7 ![]() | ||||||||||||||||||
8 ![]() |
| Must not be loaded, transported, or stored together in the same vehicle or facility. | |
| May be loaded, transported, or stored together. | |
| May be loaded, transported, or stored together only with restrictions. |
Similar substances
| UN / ID | Proper shipping name | Hazard class |
|---|---|---|
| UN 2907 | Isosorbide dinitrate mixture with not less than 60 percent lactose, mannose, starch or calcium hydrogen phosphate | 4.1 |